Fifteen codes were added to the ASCL in August, 2023:

AstroPhot: Fitting everything everywhere all at once in astronomical images
BCMemu: Model baryonic effects in cosmological simulations
caput: Utilities for building radio astronomy data analysis pipelines
DiskMINT: Disk Model For INdividual Targets
Driftscan: Drift scan telescope analysis

FastSpecFit: Fast spectral synthesis and emission-line fitting of DESI spectra
FishLSS: Fisher forecasting for Large Scale Structure surveys
FLATW’RM: Finding flares in Kepler data using machine-learning tools
glmnet: Lasso and elastic-net regularized generalized linear models
KeplerFit: Keplerian velocity distribution model fitter

MOOG_SCAT: Scattering Version of the MOOG Line Transfer Code
Nemo: Millimeter-wave map filtering and Sunyaev-Zel’dovich galaxy cluster and source detection
Rapster: Rapid population synthesis for binary black hole mergers in dynamical environments
SIMBI: 3D relativistic gas dynamics code
velocileptors: Velocity-based Lagrangian and Eulerian PT expansions of redshift-space distortions

Sixty-two codes were added to the ASCL in July, 2023:

21cmvFAST: Adding dark matter-baryon relative velocities to 21cmFAST
adiabatic-tides: Tidal stripping of dark matter (sub)haloes
AGNvar: Model spectral timing properties in active galactic nuclei
ALF: Absorption line fitter
AmpF: Amplification factor for solar lensing

APOLLO: Radiative transfer and atmosphere spectroscopic retrieval for exoplanets
axionHMcode: Non-linear power spectrum calculator
baccoemu: Cosmological emulators for large-scale structure statistics
BE-HaPPY: Bias emulator for halo power spectrum
binary_c-python: Stellar population synthesis tool and interface to binary_c

binary_c: Stellar population synthesis software framework
BOWIE: Gravitational wave binary signal analysis
connect: COsmological Neural Network Emulator of CLASS using TensorFlow
CosmicFish: Cosmology forecasting tool
DataComb: Combining data for better images

DiscVerSt: Vertical structure calculator for accretion discs around neutron stars and black holes
EAGLES: Estimating AGes from Lithium Equivalent widthS
EFTCAMB: Effective Field Theory with CAMB
EVo: Thermodynamic magma degassing model
EVolve: Growth and evolution of volcanically-derived atmospheres

FABADA: Non-parametric noise reduction using Bayesian inference
FGBuster: Parametric component separation for Cosmic Microwave Background observations
Guacho: 3D uniform mesh parallel HD/MHD code for astrophysics
GWDALI: Gravitational wave parameter estimation
gyro-interp: Gyrochronology via interpolation of open cluster rotation sequences

HAYASHI: Halo-level AnalYsis of the Absorption Signal in HI
HELA: Random Forest retrieval for exoplanet atmospheres
HilalPy: Analysis tool for lunar crescent visibility criterion
Imber: Doppler imaging tool for modeling stellar and substellar surfaces
IMRIpy: Intermediate Mass Ratio Inspirals simulator

IMRPhenomD: Phenomenological waveform model
Jdaviz: JWST astronomical data analysis tools in the Jupyter platform
LEFTfield: Forward modeling of cosmological density fields
LIMpy: Line Intensity Mapping in Python
MBASC: Multi-Band AGN-SFG Classifier

mnms: Map-based Noise ModelS
NaMaster: Unified pseudo-Cl framework
NAVanalysis: Normalized Additional Velocity analysis
orbitN: Symplectic integrator for near-Keplerian planetary systems
plan-net: Bayesian neural networks for exoplanetary atmospheric retrieval

pnautilus: Three-phase chemical code
PolyBin: Binned polyspectrum estimation on the full sky
pycrires: Data reduction pipeline for VLT/CRIRES+
pyhalomodel: Halo-model implementation for power spectra
PyIMRPhenomD: Stellar origin black hole binaries population estimator

pyPplusS: Modeling exoplanets with rings
RelicFast: Fast scale-dependent halo bias
reMASTERed: Calculate contributions to pseudo-Cl for maps with correlated masks
RUBIS: Fast centrifugal deformation program for stellar and planetary models
SAMUS: Simulator of Asteroid Malformation Under Stress

SHARK: Gas and dust hydrodynamics with dust coagulation/fragmentation
SIMPLE: Intensity map generator
SIRENA: Energy reconstruction of X-ray photons for Athena X-IFU
species: Atmospheric characterization of directly imaged exoplanets
Synthetic LISA: Simulator for LISA-like gravitational-wave observatories

TidalPy: Moon and exoplanet tidal heating and dynamics estimator
TOAST: Time Ordered Astrophysics Scalable Tools
Veusz: Scientific plotting package
WarpX: Time-based electromagnetic and electrostatic Particle-In-Cell code
WDMWaveletTransforms: Fast forward and inverse WDM wavelet transforms

WeakLensingQML: Quadratic Maximum Likelihood estimator applied to Weak Lensing
νHawkHunter: Forecasting of PBH neutrinos

Sixty codes were added to the ASCL in June, 2023:

AIOLOS: Planetary atmosphere accretion and escape simulations
Albatross: Stellar stream parameter inference with neural ratio estimation
ALminer: ALMA archive mining and visualization toolkit
apollinaire: Helioseismic and asteroseismic peakbagging frameworks
ARPACK-NG: Large scale eigenvalue problem solver

Beta-SGP: Scaled Gradient Projection algorithm using β-divergence
BOXFIT: Gamma-ray burst afterglow light curve generator
Butterpy: Stellar butterfly diagram and rotational light curve simulator
CADET: CAvity DEtection Tool
CHIPS: Circumstellar matter and light curves of interaction-powered transients simulator

COFFE: COrrelation Function Full-sky Estimator
COLASolver: Particle-Mesh N-body code
COLT: Monte Carlo radiative transfer and simulation analysis toolkit
CONCEPT: COsmological N-body CodE in PyThon
CONDUCT: Electron transport coefficients of magnetized stellar plasmas

COpops: Compute CO sizes and fluxes
CosmoGraphNet: Cosmological parameters and galaxy power spectrum from galaxy catalogs
Delight: Photometric redshift via Gaussian processes with physical kernels
ECLIPSE: Efficient Cmb poLarization and Intensity Power Spectra Estimator
ESSENCE: Evaluate spatially correlated noise in interferometric images

FacetClumps: Molecular clump detection algorithm based on Facet model
FRB: Fast Radio Burst calculations, estimations, and analysis
GER: Global Extinction Reduction
GRChombo: Numerical relativity simulator
HAFFET: Supernovae photometric and spectroscopic data analyzer

Hitomi: Cosmological analysis of anisotropic galaxy distributions
IDEFIX: Astrophysical fluid dynamics
kilopop: Binary neutron star population of optical kilonovae
lasso_spectra: Predict properties from galaxy spectra using Lasso regression
Mangrove: Infer galaxy properties using dark matter merger trees

margarine: Posterior sampling and marginal Bayesian statistics
MG-PICOLA: Simulating cosmological structure formation
Mixclask: Mixing Cloudy and SKIRT
MOBSE: Massive Objects in Binary Stellar Evolution
mockFRBhosts: Limiting the visibility and follow-up of FRB host galaxies

nuPyProp: Propagate neutrinos through the earth
nuSpaceSim: Cosmic neutrino simulation
Parthenon: Portable block-structured adaptive mesh refinement framework
PEP: Planetary Ephemeris Program
PEPITA: Prediction of Exoplanet Precisions using Information in Transit Analysis

PhotoParallax: Data-driven photometric parallaxes built with Gaia and 2MASS
pipes_vis: Interactive GUI and visualizer tool for SPS spectra
PSFMachine: Toolkit for doing PSF photometry
pybranch: Calculate experimental branching fractions and transition probabilities from atomic spectra
realfast: Real-time interferometric data analysis for the VLA

RELAGN: AGN SEDs with full GR ray tracing
rfast: Planetary spectral forward and inverse modeling tool
SAVED21cm: Global 21cm signal extraction pipeline
sbi: Simulation-based inference toolkit
SCF-FDPS: Disk-halo systems simulator

SCONCE-SCMS: Spherical and conic cosmic web finders with extended SCMS algorithms
SHERLOCK: Explore Kepler, K2, and TESS data
sstrax: Fast stellar stream modelling in JAX
SubgridClumping: Clumping factor for large low-resolution N-body simulations
SuperRad: Black hole superradiance gravitational waveform modeler

threepoint: Covariance of third-order aperture statistics
TiDE: Light curves and spectra of tidal disruption events
TIDYMESS: TIdal DYnamics of Multi-body ExtraSolar Systems
Zeus21: Simulations of 21-cm at cosmic dawn
ZodiPy: Zodiacal emission simulations in timestreams or HEALPix for solar system observers

Twenty-five codes were added to the ASCL in May, 2023:

aartfaac2ms: Aartfaac datasets converter
breizorro: Image masking tool
CELEBI: Precision localizations and polarimetric data for fast radio bursts
COLIBRI: Cosmological libraries in Python
DarkMappy: Mapping the dark universe

DDFacet: Facet-based radio imaging package
DP3: Streaming processing pipeline for radio interferometric data
EIDOS: Modeling primary beams of radio astronomy antennas
extrapops: Fast simulation and analysis of extra-galactic binary GW sources
FLAGLET: Fast and exact wavelet transform on the ball

FRIDDA: Fisher foRecast code for combIned reDshift Drift and Alpha
GLASS: Cosmological simulations on the sphere
GrGadget: Evolve metric perturbations in the weak field limit
gw_pta_emulator: Gravitational Waves via Pulsar Timing Arrays
GWSurrogate: Gravitational wave surrogate models

JEDI: James’s EVE Dimming Index
katdal: MeerKAT Data Access Library
KERN: Radio telescope toolkit
killMS: Direction-dependent radio interferometric calibration package
Nextflow: DSL for data-driven computational pipelines

QuartiCal: Fast radio interferometric calibration
simple-m2m: Extensions to the standard M2M algorithm for full modeling of observational data
sterile-dm: Sterile neutrino production
Stimela: Containerized radio interferometry scripting framework
Virtual Telescope: Next-Generation Space Telescope Simulator

Six codes were added to the ASCL in April, 2023. What can I say? Should have been more; sorry!

ASSIST: Solar system test particles trajectories integrator
Applefy: Robust detection limits for high-contrast imaging
BatAnalysis: HEASOFT wrapper for processing Swift-BAT data
FALCO: Fast Linearized Coronagraph Optimizer in MATLAB
FALCO: Fast Linearized Coronagraph Optimizer in Python
JET: JWST Exoplanet Targeting

Twenty codes were added to the ASCL in March, 2023:

bajes: Bayesian Jenaer software
Blobby3D: Bayesian inference for gas kinematics
cysgp4: Wrapper for C++ SGP4 satellite library
Delphes: Fast simulation of a generic collider experiment
EvoEMD: Cosmic Evolution with an Early Matter-Dominated era

FastJet: Jet finding in pp and e+e− collisions
GPCC: Gaussian process cross-correlation for time delay estimation
HaloGraphNet: Predict halo masses from simulations
line_selections: Automatic line detection for large spectroscopic surveys
MORPHOFIT: Morphological analysis of galaxies

naif: Frequency analysis package
nd-redshift: Number Density Redshift Evolution Code
Pandora: Fast exomoon transit detection algorithm
pulsar_spectra: Pulsar flux density measurements, spectral models fitting, and catalog
PyCom: Interstellar communication

SatGen: Semi-analytical satellite galaxy and dark matter halo generator
Scri: Manipulate time-dependent functions of spin-weighted spherical harmonics
SeeKAT: Localizer for transients detected in tied-array beams
SIDM: Density profiles of self-interacting dark-matter halos with inhabitant galaxies
spinsfast: Fast and exact spin-s spherical harmonic transforms

Twenty-six codes were added to the ASCL in February, 2023:

AART: Adaptive Analytical Ray Tracing
AMICAL: Aperture Masking Interferometry Calibration and Analysis Library
AnalyticLC: Dynamical modeling of planetary systems
celmech: Sandbox for celestial mechanics calculations

deconfuser: Fast orbit fitting to directly imaged multi-planetary systems
Diffmah: Differentiable models of halo and galaxy formation history
Diffstar: Differentiable star formation histories
DSPS: Differentiable Stellar Population Synthesis

EXOTIC: EXOplanet Transit Interpretation Code
FCFC: C toolkit for computing correlation functions from pair counts
GCP: Automated GILDAS-CLASS Pipeline
HawkingNet: Finding Hawking points in the Cosmic Microwave Background

HDMSpectra: Dark Matter Spectra from the electroweak to the Planck scale
kima: Exoplanet detection in RVs with DNest4 and GPs
MADCUBA: MAdrid Data CUBe Analysis
nicaea: NumerIcal Cosmology And lEnsing cAlculations

PHOTOe: Monte Carlo model for simulating the slowing down of photoelectrons
RALF: RADEX Line Fitter
RCR: Robust Chauvenet Outlier Rejection
RichValues: Managing numeric values with uncertainties and upper/lower limits

SASHIMI-C: Semi-Analytical SubHalo Inference ModelIng for Cold Dark Matter
SASHIMI-W: Semi-Analytical SubHalo Inference ModelIng for Warm Dark Matter
SFQEDtoolkit: Strong-field QED processes modeling for PIC and Monte Carlo codes
swyft: Scientific simulation-based inference at scale

UBER: Universal Boltzmann Equation Solver
UniverseMachine: Empirical model for galaxy formation

Thirty codes were added to the ASCL in January, 2023:

ALMA3: plAnetary Love nuMbers cAlculator
CALSAGOS: Select cluster members and search, find, and identify substructures
desitarget: Selecting DESI targets from photometric catalogs
Fastcc: Broadband radio telescope receiver fast color corrections
FERRE: Match physical models to measurements

fitOmatic: Interferometric data modeling
GalCEM: GALactic Chemical Evolution Model
HEADSS: HiErArchical Data Splitting and Stitching for non-distributed clustering algorithms
HiLLiPoP: High-L Likelihood Polarized for Planck
HIPP: HIgh-Performance Package for scientific computation

KCWI_DRP: Keck Cosmic Web Imager Data Reduction Pipeline in Python
kderp: KCWI Data Extraction and Reduction Pipeline in IDL
LBL: Line-by-line velocity measurements
LoLLiPoP: Low-L Likelihood Polarized for Planck
MGwave: Detect kinematic moving groups in astronomical data

PoWR: Potsdam Wolf-Rayet Models
Puri-Psi: Radio interferometric imaging
pyExoRaMa: An interactive tool to investigate the radius-mass diagram for exoplanets
Pyxel: Detector and end-to-end instrument simulation
ReACT: Calculation of non-linear power spectra from non-standard physics

Rosetta: Platform for resource-intensive, interactive data analysis
Self-cal: Optical/IR long-baseline interferometry
SOAP-GPU: Spectral time series simulations with GPU
SOXS: Simulated Observations of X-ray Sources
special: SPEctral Characterization of directly ImAged Low-mass companions

VDA: Void Dwarf Analyzer
WALDO: Waveform AnomaLy DetectOr
WF4Py: Gravitational waves waveform models in pure Python language
XGA: Efficient analysis of XMM observations
Xpol: Pseudo-Cl power spectrum estimator

Twenty-six codes were added to the ASCL in December, 2022:

AbundanceMatching: Subhalo abundance matching with scatter
BANZAI-NRES: BANZAI data reduction pipeline for NRES
Burning Arrow: Black hole massive particles orbit degradation
CONTROL: Colorado Ultraviolet Transit Experiment data reduction pipeline

Elysium: Observing black hole accretion disks
Eventdisplay: Analysis and reconstruction package for ground-based Gamma-ray astronomy
FastDF: Integrating neutrino geodesics in linear theory
GPry: Bayesian inference of expensive likelihoods with Gaussian processes

GWFAST: Fisher information matrix python package for gravitational-wave detectors
Hazma: Compute indirect detection constraints on sub-GeV dark matter
Infinity: Calculate accretion disk radiation forces onto moving particles
m2mcluster: Star clusters made-to-measure modeling

MGCosmoPop: Modified gravity and cosmology with binary black holes population models
MTNeedlet: Spherical maps filtering
Omega: Photon equations of motion
PACMAN: Planetary Atmosphere, Crust, and MANtle geochemical evolution

panco2: Pressure profile measurements of galaxy clusters
powspec: Power and cross spectral density of 2D arrays
PyMCCF: Python Modernized Cross Correlation Function for reverberation mapping studies
pyTANSPEC: Python tool for extracting 1D TANSPEC spectra from 2D images

sf_deconvolve: PSF deconvolution and analysis
SImMER: Stellar Image Maturation via Efficient Reduction
SourceXtractor++: Extracts sources from astronomical images
Spender: Neural spectrum encoder and decoder

Tranquillity: Creating black hole spin divergence plots
xwavecal: Wavelength calibrating echelle spectrographs

Twenty codes were added to the ASCL in November, 2022:

2DFFTUtils: 2DFFT Utilities implementation
AMBER: Abundance Matching Box for the Epoch of Reionization
APERO: A PipelinE to Reduce Observations
baobab: Training data generator for hierarchically modeling strong lenses with Bayesian neural networks
BiGONLight: Bi-local Geodesic Operators framework for Numerical Light propagation

BlackJAX: Library of samplers for JAX
EXCEED-DM: EXtended Calculation of Electronic Excitations for Direct detection of Dark Matter
fastSHT: Fast Spherical Harmonic Transforms
gsf: Grism SED Fitting package
H-FISTA: Phase retrieval for pulsar spectroscopy

KC: Analytical propagator with collision detection for Keplerian systems
Korg: 1D local thermodynamic equilibrium stellar spectral synthesis
mgcnn: Standard and modified gravity (MG) cosmological models classifier
ODNet: Asteroid occultation detection convolutional neural network
ovejero: Bayesian neural network inference of strong gravitational lenses

PAHDecomp: Decomposing the mid-IR spectra of extremely obscured galaxies
PDFchem: Average abundance of species from Av-PDFs
pmclib: Population Monte Carlo library
PTAfast: PTA correlations from stochastic gravitational wave background
unTimely_Catalog_explorer: A search and visualization tool for the unTimely Catalog