| 0ad | | Cross-platform, 3D and historically-based real-time strategy game |
| 0ad-data | | Cross-platform, 3D and historically-based real-time strategy game (data files) |
| 389-ds-base | | 389 Directory Server (base) |
| 3cpio | | Manage Linux kernel initramfs cpio files written in Rust |
| 4ti2 | | A software package for algebraic, geometric and combinatorial problems on linear spaces |
| 6tunnel | | Tunnels IPv6 connections for IPv4-only applications |
| 7zip | | File archiver for extremely high compression |
| 9base | | Port of various original Plan9 tools to unix |
| a2jmidid | | A daemon for exposing legacy ALSA sequencer applications in JACK MIDI system. |
| a2ps | | An Any to PostScript filter |
| a52dec | | Library for decoding ATSC A/52 (AC-3) audio streams |
| aalib | | ASCII art graphic library |
| aarch64-linux-gnu-binutils | | A set of programs to assemble and manipulate binary and object files for the ARM64 target |
| aarch64-linux-gnu-gcc | | The GNU Compiler Collection - cross compiler for ARM64 target |
| aarch64-linux-gnu-gdb | | The GNU Debugger for the ARM64 target |
| aarch64-linux-gnu-glibc | | GNU C Library ARM64 target |
| aarch64-linux-gnu-linux-api-headers | | Kernel headers sanitized for use in userspace (aarch64-linux-gnu) |
| aardvark-dns | | Authoritative dns server for A/AAAA container records |
| abc | | System for Sequential Logic Synthesis and Formal Verification |
| abcmidi | | Tools for ABC and MIDI files |
| abduco | | Tool for session {at,de}tach support which allows a process to run independently from its controlling terminal |
| abi-compliance-checker | | Check ABI compatibility between library versions |
| abi-dumper | | Dump ABI of an ELF object containing DWARF debug info |
| abiword | | Fully-featured word processor |
| abletonlink | | Synchronizes musical beat, tempo, and phase across multiple applications |
| abseil-cpp | | Collection of C++ library code designed to augment the C++ standard library |
| absl-py | | Abseil Python Common Libraries |
| abuild | | Alpine build tools |
| accent-color-change | | Change your accent color globally on GNOME 47+ |
| accerciser | | Interactive Python accessibility explorer for the GNOME desktop |
| accessibility-inspector | | Inspect your application accessibility tree |
| accounts-qml-module | | Expose the Online Accounts API to QML applications |
| accountsservice | | D-Bus interface for user account query and manipulation |
| accountsservice-ubuntu | | D-Bus interface for user account query and manipulation |
| accuraterip-checksum | | A C99 commandline program to compute the AccurateRip checksum of singletrack WAV files |
| acl | | Access control list utilities, libraries and headers |
| acme | | Assembler for the 6502, 6510, 65c02 and 65816 processors |
| acme-redirect | | Tiny http daemon that answers acme challenges and redirects everything else to https |
| acme-tiny | | A tiny script to issue and renew TLS certs from Let's Encrypt |
| acme-user | | acme-tiny systemd files for running as dedicated user instead of root. |
| acme.sh | | An ACME Shell script, an acme client alternative to certbot |
| acorn | | A tiny, fast JavaScript parser, written completely in JavaScript. |
| acpi | | Client for battery, power, and thermal readings |
| acpi_call-dkms | | A linux kernel module that enables calls to ACPI methods through /proc/acpi/call - module sources |
| acpica | | ACPI tools, including Intel ACPI Source Language compiler |
| acpid | | A daemon for delivering ACPI power management events with netlink support |
| acpidump-all | | Walk through all ACPI tables with their addresses |
| acsccid | | PC/SC driver that supports ACS CCID smart card readers. |
| act | | Run your GitHub Actions locally |
| actionlint | | Static checker for GitHub Actions workflow files |