Fourteen codes were added to the ASCL in March 2020; I’d hoped to process more entries, but well, you know… circumstances. I hope to do better in April.

acorns: Agglomerative Clustering for ORganising Nested Structures
AstroHOG: Analysis correlations using the Histograms of Oriented Gradients
CoastGuard: Automated timing data reduction pipeline
HOMER: MCMC-based inverse modeling code
MAGNETAR: Histogram of relative orientation calculator for MHD observations

MARGE: Machine learning Algorithm for Radiative transfer of Generated Exoplanets
PORTAL: POlarized Radiative Transfer Adapted to Lines
PYSOLATOR: Remove the orbital modulation from a binary pulsar and/or its companion
RAPID: Real-time Automated Photometric IDentification
RHT: Rolling Hough Transform

scousepy: Semi-automated multi-COmponent Universal Spectral-line fitting Engine
TESS-Point: High precision TESS pointing tool
TOASTER: Times-Of-Arrival Tracker
Torch: Coupled gas and N-body dynamics simulator

Stay safe, stay home, stay well.

Twenty-two codes were added to the ASCL in February 2020:

Apercal: Pipeline for the Westerbork Synthesis Radio Telescope Apertif upgrade
Bayesfit: Command-line program for combining Tempo2 and MultiNest components
Cobra: Bayesian pulsar searching
CR-SISTEM: Symplectic integrator for lunar core-mantle and orbital dynamics
DASH: Deep Automated Supernova and Host classifier

DISKMODs: Accretion Disk Radial Structure Models
DMRadon: Radon Transform calculation tools
ExoCAM: Exoplanet Community Atmospheric Model
ExoRT: Two-stream radiative transfer code
ExoSim: Simulator for predicting signal and noise in transit spectroscopy observations

GizmoAnalysis: Read and analyze Gizmo simulations
GWecc: Calculator for pulsar timing array signals due to eccentric supermassive binaries
HaloAnalysis: Read and analyze halo catalogs and merger trees
libstempo: Python wrapper for Tempo2
ODUSSEAS: Observing Dwarfs Using Stellar Spectroscopic Energy-Absorption Shapes

ORIGIN: detectiOn and extRactIon of Galaxy emIssion liNes
ProSpect: Spectral generation package
PyHammer: Python spectral typing suite
RASCAS: Resonant line transfer in AMR simulations
ScamPy: Sub-halo Clustering and Abundance Matching Python interface

SDAR: Slow-Down Algorithmic Regularization code for solving few-body problems
triceratops: Candidate exoplanet rating tool

Fifteen codes were added to the ASCL in January 2020:

BTS: Behind The Spectrum
CosMOPED: Compressed Planck likelihood
DebrisDiskFM: Debris Disk Forward Modeling
ExoTETHyS: Exoplanetary transits and eclipsing binaries modeler
FAKEOBS: Model visibilities generator

FragMent: Fragmentation techniques for studying filaments
gnm: The MCMC Jagger
MCMCI: Markov Chain Monte Carlo + Isochrones method for characterizing exoplanetary systems
Min-CaLM: Mineral compositional analysis on debris disk spectra
ORCS: Analysis engine for SITELLE spectral cubes

Peasoup: C++/CUDA GPU pulsar searching library
Protostellar Evolution: Stellar evolution simulator
RPPPS: Re-analyzing Pipeline for Parkes Pulsar Survey
sf3dmodels: Star-forming regions 3D modelling package
TRANSPHERE: 1-D spherical continuum radiative transfer

Twenty codes were added to the ASCL in December 2019:

anesthetic: Nested sampling visualization
ASKAPsoft: ASKAP science data processor software
AstroAccelerate: Accelerated software package for processing time-domain radio astronomy data
Athena++: Radiation GR magnetohydrodynamics code
casacore: Suite of C++ libraries for radio astronomy data processing

DALiuGE: Data Activated Liu Graph Engine
Enterprise: Enhanced Numerical Toolbox Enabling a Robust PulsaR Inference SuitE
FORSTAND: Flexible ORbit Superposition Toolbox for ANalyzing Dynamical models
GAME: GAlaxy Machine learning for Emission lines
GriSPy: Fixed-radius nearest neighbors grid search in Python

GWpy: Python package for studying data from gravitational-wave detectors
HARMPI: 3D massively parallel general relativictic MHD code
HSIM: HARMONI simulation pipeline
MRExo: Non-parametric mass-radius relationship for exoplanets
Polyspectrum: Computing polyspectra using an FFT estimator

PopSyCLE: Population Synthesis for Compact object Lensing Events
PTMCMCSampler: Parallel tempering MCMC sampler package written in Python
QSOSIM: Simulated Quasar Spectrum Generator
STACKER: Stack sources in interferometric data
Tangos: Framework and web interface for database-driven analysis of numerical structure formation simulations

Twenty-four codes were added to the ASCL in November 2019:

ATHOS: A Tool for HOmogenizing Stellar parameters
ATLAS: Turning Dopplergram images into frequency shift measurements
CLUSTEREASY: Lattice simulator for evolving interacting scalar fields in an expanding universe on parallel computing clusters
comb: Spectral line data reduction and analysis package

FFTLog-and-beyond: Generalized FFTLog algorithm
frbpoppy: Fast radio burst population synthesis in Python
Fruitbat: Fast radio burst redshift estimation
HeatingRate: Radioactive heating rate and macronova (kilonova) light curve

HLattice: Scalar fields and gravity simulator for the early universe
IDG: Image Domain Gridding
LATTICEEASY: Lattice simulator for evolving interacting scalar fields in an expanding universe
MARTINI: Mock spatially resolved spectral line observations of simulated galaxies

miluphcuda: Smooth particle hydrodynamics code
MORDI: Massively-Overlapped Ring-Diagram Inversion
OpenSPH: Astrophysical SPH and N-body simulations and interactive visualization tools
OrbWeaver: Galaxy/(sub)halo orbital processing tool

PLAN: A Clump-finder for Planetesimal Formation Simulations
planetplanet: General photodynamical code for exoplanet light curves
PypeIt: Python spectroscopic data reduction pipeline
TreeFrog: Construct halo merger trees and compare halo catalogs

uvplot: Interferometric visibilities plotter
VELOCIraptor-STF: Six-dimensional Friends-of-Friends phase space halo finder
WhereWolf: Galaxy/(sub)Halo ghosting tool for N-body simulations
Zeltron: Explicit 3D relativistic electromagnetic Particle-In-Cell code

Twenty-two codes were added to the ASCL in October 2019:

a3cosmos-gas-evolution: Galaxy cold molecular gas evolution functions
ANNz2: Estimating photometric redshift and probability density functions using machine learning methods
AOtools: Adaptive optics modeling and analysis toolkit
AOTOOLS: Reduce IR images from Adaptive Optics
ChainConsumer: Corner plots, LaTeX tables and plotting walks

Cobaya: Bayesian analysis in cosmology
DM_phase: Algorithm for correcting dispersion of radio signals
E0102-VR: Virtual Reality application to visualize the optical ejecta in SNR 1E 0102.2-7219
ECLIPS3D: Linear wave and circulation calculations
EMERGE: Empirical ModEl for the foRmation of GalaxiEs

exoplanet: Probabilistic modeling of transit or radial velocity observations of exoplanets
GetDist: Monte Carlo sample analyzer
LEO-Py: Likelihood Estimation of Observational data with Python
MarsLux: Illumination Mars maps generator
MiSTree: Construct and analyze Minimum Spanning Tree graphs

OCD: O’Connell Effect Detector using push-pull learning
orbitize: Orbit-fitting for directly imaged objects
PEXO: Precise EXOplanetology
PINK: Parallelized rotation and flipping INvariant Kohonen maps
PreProFit: Pressure Profile Fitter for galaxy clusters in Python

qnm: Kerr quasinormal modes, separation constants, and spherical-spheroidal mixing coefficients calculator
TLS: Transit Least Squares

Fourteen codes were added to the ASCL in September 2019:

AREPO: Cosmological magnetohydrodynamical moving-mesh simulation code
Auto-multithresh: Automated masking for clean
ChempyMulti: Multi-star Bayesian inference with Chempy
CLOVER: Convolutional neural network spectra identifier and kinematics predictor
EBHLIGHT: General relativistic radiation magnetohydrodynamics with Monte Carlo transport

EPOS: Exoplanet Population Observation Simulator
fgivenx: Functional posterior plotter
HADES: Hexadecapolar Analysis for Dust Estimation in Simulations (of CMB B-mode thermal dust emission)
HISS: HI spectra stacker
MultiColorFits: Colorize and combine multiple fits images for visually aesthetic scientific plots

RascalC: Fast code for galaxy covariance matrix estimation
SecularMultiple: Hierarchical multiple system secular evolution model
TPI: Test Particle Integrator
WVTICs: SPH initial conditions using Weighted Voronoi Tesselations

Thirty-two codes were added to the ASCL in July 2019:

Astro-SCRAPPY: Speedy Cosmic Ray Annihilation Package in Python
astrodendro: Astronomical data dendrogram creator
beamconv: Cosmic microwave background detector data simulator
CMDPT: Color Magnitude Diagrams Plot Tool
Dewarp: Distortion removal and on-sky orientation solution for LBTI detectors

GaussPy: Python implementation of the Autonomous Gaussian Decomposition algorithm
GaussPy+: Gaussian decomposition package for emission line spectra
GIST: Galaxy IFU Spectroscopy Tool
healvis: Radio interferometric visibility simulator based on HEALpix maps
intensitypower: Spectrum multipoles modeler

MCRGNet: Morphological Classification of Radio Galaxy Network
MGB: Interactive spectral classification code
molly: 1D astronomical spectra analyzer
OMNICAL: Redundant calibration code for low frequency radio interferometers
Plonk: Smoothed particle hydrodynamics data analysis and visualization

POCS: PANOPTES Observatory Control System
PRISM: Probabilistic Regression Instrument for Simulating Models
pyGTC: Parameter covariance plots
pyuvdata: Pythonic interface to interferometric data sets
REVOLVER: REal-space VOid Locations from suVEy Reconstruction

ROHSA: Separation of diffuse sources in hyper-spectral data
RVSpecFit: Radial velocity and stellar atmospheric parameter fitting
SARA-PPD: Preconditioned primal-dual algorithm for radio-interferometric imaging
sbpy: Small-body planetary astronomy
schwimmbad: Parallel processing pools interface

Skyfield: High precision research-grade positions for planets and Earth satellites generator
SPAM: Hu-Sawicki f(R) gravity imprints search
StePar: Inferring stellar atmospheric parameters using the EW method
TurbuStat: Turbulence statistics in spectral-line data cubes
Wōtan: Stellar detrending methods

XDF-GAN: Mock astronomical survey generator
ZChecker: Zwicky Transient Facility moving target checker for short object lists

Twenty-two codes were added to the ASCL in June 2019:

Astroalign: Asterism-matching alignment of astronomical images
Blimpy: Breakthrough Listen I/O Methods for Python
centerRadon: Center determination code in stellar images
FREDDA: A fast, real-time engine for de-dispersing amplitudes
GPUVMEM: Maximum Entropy Method (MEM) GPU algorithm for radio astronomical image synthesis

Kalman: Forecasts and interpolations for ALMA calibrator variability
limb-darkening: Limb-darkening coefficients generator
Lizard: An extensible Cyclomatic Complexity Analyzer
LIZARD: Particle initial conditions for cosmological simulations
mcfit: Multiplicatively Convolutional Fast Integral Transforms

MEGAlib: Medium Energy Gamma-ray Astronomy library
MORPHEUS: A 3D Eulerian Godunov MPI-OpenMP hydrodynamics code with multiple grid geometries
Morpheus: Pixel-level analysis of astronomical image data
OIT: Nonconvex optimization approach to optical-interferometric imaging
PandExo: Instrument simulations for exoplanet observation planning

PlasmaPy: Core Python package for plasma physics
PyA: Python astronomy-related packages
pyLIMA: Microlensing modeling package
PyMORESANE: Python MOdel REconstruction by Synthesis-ANalysis Estimators
T-RECS: Tiered Radio Extragalactic Continuum Simulation

The Exo-Striker: Transit and radial velocity interactive fitting tool for orbital analysis and N-body simulations
turboSETI: Python-based SETI search algorithm