Many fixes to the cd-rom decoder and core that fixed almost 150 games
Improved input devices support
On the fly memory card change
Fixed changedisc feature
Support for SBI subchannel files
Support for PBP disc images
Cheat codes support
VICE v2.4 out
Too many changes to list here. You can read about what's new here. VICE is an emulator that emulates the C64, the C64DTV, the C64SC, the C128, the VIC20, most PET models, the PLUS4, and the CBM-II.
From the home page: 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).