NASM, the Netwide Assembler, is an 80x86 and x86-64 assembler designed for portability and modularity. It supports a range of object file formats, including Linux and *BSD a.out, ELF, COFF, Mach-O, Microsoft 16-bit OBJ, Windows32 and Windows64. It will also output plain binary files. Its syntax is designed to be simple and easy to understand, similar to Intel's but less complex. It supports all currently known x86 architectural extensions, and has strong support for macros.

ASM6f is a fork of ASM6, primarily targeted at NES/Famicom development.

• Support for some illegal/undocumented opcodes

• FCEUX-compatible .nl output files

• Output of Lua-compatible symbol files

• New IGNORENL and ENDINL directives

• Support for iNES original and 2.0 header insertion

• Output of .cdl files, for use with FCEUX/Mesen

• Output of Mesen-compatible symbol files (both old and new formats)

• Generic +/- labels do not break @local scope

• Support for a: prefix to force absolute addressing for zero-page addresses.

AS is a portable macro cross-assembler targeting a wide range of microprocessors and microcontrollers, including devices from Intel, Motorola, MOS Technology, Hitachi, Fujitsu, NEC, Texas Instruments, Zilog and many other manufacturers.

xa is a high-speed, two-pass portable cross-assembler. It understands mnemonics and generates code for NMOS 6502s (such as 6502A, 6504, 6507, 6510, 7501, 8500, 8501, 8502 ...), CMOS 6502s (65C02 and Rockwell R65C02) and the 65816.

Cpu_features is a cross-platform C library to retrieve CPU features (such as available instructions) at runtime, and supports these CPU architectures

• x86-64

• AArch64

• ARM

• MIPS

• POWER

• RISC-V

• LoongArch

• S390x

The NEON_2_SSE.h file is intended to simplify ARM-to-IA32 porting. It makes the correspondence (or a real porting) of ARM NEON intrinsics as defined in the arm_neon.h header and x86 SSE (up to SSE4.2) intrinsic functions as defined in corresponding x86 compilers headers files.

Blinkenlights is a command-line debugger that focuses on visualizing how software changes memory. It can emulate statically-linked i8086 and x86_64-pc-linux-gnu programs.

GNU libjit is a library that provides generic Just-In-Time compiler functionality independent of any particular bytecode, language, or runtime

This package provides a CIANNA - a general-purpose deep learning framework primarily developed and used for astronomical data analysis.

SEP makes the core algorithms of sextractor available as a library of stand-alone functions and classes. These operate directly on in-memory arrays (no FITS files or configuration files). The code is derived from the Source Extractor code base (written in C) and aims to produce results compatible with Source Extractor whenever possible. SEP consists of a C library with no dependencies outside the standard library, and a Python module that wraps the C library in a Pythonic API. The Python wrapper operates on NumPy arrays with NumPy as its only dependency.

STPSF produces simulated PSFs for the James Webb Space Telescope, NASA's flagship infrared space telescope. STPSF can simulate images for any of the four science instruments plus the fine guidance sensor, including both direct imaging, coronagraphic, and spectroscopic modes.

sbpy is a package for small-body planetary astronomy. It is meant to supplement functionality provided by astropy with functions and methods that are frequently used in the context of planetary astronomy with a clear focus on asteroids and comets. Features:

• observation planning tools tailored to moving objects

• photometry models for resolved and unresolved observations

• wrappers and tools for astrometry and orbit fitting

• spectroscopy analysis tools and models for reflected solar light and emission from gas

• cometary gas and dust coma simulation and analysis tools

• asteroid thermal models for flux estimation and size/albedo estimation

• image enhancement tools for comet comae and PSF subtraction tools

• lightcurve and shape analysis tools

• access tools for various databases for orbital and physical data, as well as ephemerides services

This simulation program lets you explore our universe in three dimensions. Celestia simulates many different types of celestial objects. From planets and moons to star clusters and galaxies, you can visit every object in the expandable database and view it from any point in space and time. The position and movement of solar system objects is calculated accurately in real time at any rate desired.

SNData provides an access to data releases published by a variety of supernova (SN) surveys. It is designed to support the development of scalable analysis pipelines that translate with minimal effort between and across data sets. A summary of accessible data is provided below. Access to additional surveys is added upon request or as needed for individual research projects undertaken by the developers.

Astropy is a single core package for Astronomy in Python. It contains much of the core functionality and some common tools needed for performing astronomy and astrophysics.

This package provides data content for Celestia.

• Scientific Data Base

• Texture maps

• 3D Models

This package provides a Python wrapper for tempo2 - a high precision pulsar timing tool.

This package implements a funtionality for hierarchical analysis of strong lensing systems to infer lens properties and cosmological parameters simultaneously. It allows to fit lenses with measured time delays, imaging information, kinematics constraints and standardizable magnifications with parameters described on the ensemble level.

CCfits is an object oriented interface to the cfitsio library. It is designed to make the capabilities of cfitsio available to programmers working in C++. It is written in ANSI C++ and implemented using the C++ Standard Library with namespaces, exception handling, and member template functions.

LibXISF is C++ library that can read and write XISF files produced by PixInsight. It implements XISF 1.0 specification.

Photutils is an Astropy package for detection and photometry of astronomical sources.

This package implements a functionality to match sky on image mosaic.

The package statmorph implements functionality of calculating non-parametric morphological diagnostics of galaxy images (e.g., Gini-M_20 and CAS statistics), as well as fitting 2D Sérsic profiles.

astroterm is a terminal-based star map written in C. It displays the real-time positions of stars, planets, constellations, and more, all within your terminal - no telescope required!