BizHawk 2.11.1 gathers more than forty systems into one window: ten save slots plus unlimited named states, frame advance with instant rewind, memory editing, Lua and C# scripting, and the piano roll style TAStudio.

PCSX-Redux is an open source fork of PCSX that drops the plugin system for one monolith, then adds a GDB server, Ghidra hooks, a Lua interface and a VRAM viewer. There is no version number: the builds ship as rolling snapshots of the main branch.

Vita3K is an open source PS Vita emulator written in C++, shipping nightly builds for Windows, Linux, macOS and Android. More than half the tested titles are marked playable.

An open source 3DS emulator taken over by its community, assembled from two branches that each kept the earlier code moving, published under GPL-3.0, with builds for Windows, macOS and Linux and a release rhythm that has stayed alive.

An open-source emulator for GameCube and Wii that runs those games on a computer in full HD 1080p, works with ordinary PC controllers and supports netplay. The current build is 2609a.

A free open source tool for importing games in bulk and managing cover art, covering emulator ROMs and games from other platforms, with fuzzy matching and more than a hundred presets built in and builds for Windows, macOS and Linux.

Bind every stick, trigger and button to a key, a mouse movement or a macro, tune the deadzone and the response curve, and let profiles switch themselves when a game starts. Free and open.

The first PlayStation left behind a catalogue nobody can count. Connecting the original hardware to a modern television does not do it justice. DuckStation rebuilds the presentation: resolution scaling, texture filtering, geometry correction and widescreen patches.

Heroic pulls the store libraries into a single window: sign in once per store, browse and install from one list, keep updates and cloud saves in one place, and set compatibility layers from a dropdown instead of a command line, on three desktop systems and on handhelds.

DeSmuME is the oldest open-source emulator for the handheld with two stacked screens, maintained since 2006 and available for the three desktop systems. A scaling factor pulls 3D scenes far past the native 256x192, a dynamic recompiler covers slow machines, and the frame-accurate toolchain with a scripting debugger is what makes it a workbench rather than a toy.

RetroArch is an open-source frontend that emulates nothing by itself: it drives libretro cores, one per machine, so the interface, the gamepad mapping, the saves and the picture settings are configured once. The picture filters, save states, rewinding and netplay live in the frontend and work with any core.

A multi-platform emulator and debugger written in C++, running on Windows, Linux, macOS and FreeBSD. The official compatibility list puts the playable share above seventy percent, and the current build is 0.0.42.

Wrye Bash 315 is a long maintained open source mod manager for a family of role-playing games: it merges the edits of hundreds of mods into one patch and traces every file a package installs.