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.

This package provides a Intel 8086 (primarily 16-bit) assembler, a C compiler and a linker. The assembler uses Intel syntax (also Intel order of operands).

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.

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

Yasm is a complete rewrite of the NASM assembler.

Yasm currently supports the x86 and AMD64 instruction sets, accepts NASM and GAS assembler syntaxes, outputs binary, ELF32, ELF64, 32 and 64-bit Mach-O, RDOFF2, COFF, Win32, and Win64 object formats, and generates source debugging information in STABS, DWARF 2, and CodeView 8 formats.

The SIMDe header-only library provides fast, portable implementations of SIMD intrinsics on hardware which doesn't natively support them, such as calling SSE functions on ARM. There is no performance penalty if the hardware supports the native implementation (e.g., SSE/AVX runs at full speed on x86, NEON on ARM, etc.).

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.

FASM is an assembler that supports x86 and IA-64 Intel architectures. It does multiple passes to optimize machine code. It has macro abilities and focuses on operating system portability.

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.

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 Lightning is a library that generates assembly language code at run-time. Thus, it is useful in creating Just-In-Time compilers. It abstracts over the target CPU by exposing a standardized RISC instruction set to the clients.

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.

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

RGBDS (Rednex Game Boy Development System) is an assembler/linker package for the Game Boy and Game Boy Color. It consists of:

• rgbasm (assembler)

• rgblink (linker)

• rgbfix (checksum/header fixer)

• rgbgfx (PNG-to-Game Boy graphics converter)

armips is an assembler with full support for the MIPS R3000, MIPS R4000, Allegrex and RSP instruction sets, partial support for the EmotionEngine instruction set, as well as complete support for the ARM7 and ARM9 instruction sets, both THUMB and ARM mode.

ACME is a 6502, 6510, 65c02 and 65816 cross assembler that supports global/local/anonymous labels, offset assembly, conditional assembly and looping assembly. It can include other source files as well as binaries while assembling. Calculations can be done in integer or float mode.

In EyE an artificial neural network connected to pixels of a moving window (retina) is trained to associate these input stimuli to the corresponding response in one or several output image(s). The resulting filter can be loaded in SExtractor to operate complex, wildly non-linear filters on astronomical images. Typical applications of EyE include adaptive filtering, feature detection and cosmetic corrections.

This package provides a Python module to various STScI image array manipulation functions.

The casacore package contains the core libraries of the old AIPS++/CASA (Common Astronomy Software Application) package. This split was made to get a better separation of core libraries and applications. CASA is now built on top of Casacore.

Astrolib PySynphot (hereafter referred to only as pysynphot) is an object-oriented replacement for STSDAS SYNPHOT synthetic photometry package in IRAF. pysynphot simulates photometric data and spectra as they are observed with the Hubble Space Telescope (HST). Passbands for standard photometric systems are available, and users can incorporate their own filters, spectra, and data.

lenstronomy is a multi-purpose software package to model strong gravitational lenses. lenstronomy finds application for time-delay cosmography and measuring the expansion rate of the Universe, for quantifying lensing substructure to infer dark matter properties, morphological quantification of galaxies, quasar-host galaxy decomposition and much more.

The Python-based Space Physics Environment Data Analysis Software (PySPEDAS) framework supports multi-mission, multi-instrument retrieval, analysis, and visualization of heliophysics time series data.

PyIRI is a Python implementation of the International Reference Ionosphere model. It provides fast, global, and altitude‑dependent evaluation of ionospheric parameters using a new spherical harmonics (SH) architecture. The model supports multiple coordinate systems and efficiently evaluates all grid points and time frames simultaneously.

This package provides a range of colormaps designed for scientific use with Matplotlib. It includes perceptually uniform sequential colormaps such as abre, dusk, kepl, and octarine, as well as monochromatic sequential colormaps like blue, green, and red, and others (algae, pastel, and xray).