RetroArch v1.2 R2 is released. RetroArch is a multi-system emulator for Linux, Windows, Mac OS X and *BSD. It is formerly known as SSNES. Its design and background is quite different than most other emulators as RetroArch does not implement an emulation core itself. RetroArch talks to libretro, a generic emulator core API. This means that RetroArch is core agnostic, and it does not care which emulator core is running.

Currently there are libretro implementations for systems such as SNES, NES, GBA, GB/GBC, Genesis, and even arcade games (Final Burn Alpha).

libretro isn't only usable for emulators. A preliminary port of an open source reimplementation of Cave Story has been ported to libretro as well.

RetroArch believes in modularity. The application itself is a command-line driven application suitable for HTPC and/or headless use. There also exists a GUI frontend for RetroArch, supporting every single config option available in RetroArch.

RetroArch v1.2 R2 Changelog:
mac builds should be coming this sunday
cores aren’t included anymore, you can use the built-in core updater to fetch cores
assets can be updated from within the application on PC and mobile
content can be downloaded from within the application, we’re testing this with Game&Watch
input binding is done completely from within the applicataion
per-core/per-game remapping are available from within the application
per-core/per-game configuration overrides are now possible
sort saves and savestates in folders automatically
movie recording can be enabled from within the application
content can now be scanned to create collections
lots more…

Download: RetroArch v1.2 R2 x86
Download: RetroArch v1.2 R2 x64
Source: Here