MAME stands for Multiple Arcade Machine Emulator. When used in conjunction with an arcade game’s data files (ROMs), MAME will more or less faithfully reproduce that game on a PC. The ROM images that MAME utilizes are “dumped” from arcade games’ original circuit-board ROM chips. MAME becomes the “hardware” for the games, taking the place of their original CPUs and support chips. Therefore, these games are NOT simulations, but the actual, original games that appeared in arcades. MAME’s purpose is to preserve these decades of video-game history. As gaming technology continues to rush forward, MAME prevents these important “vintage” games from being lost and forgotten. This is achieved by documenting the hardware and how it functions, thanks to the talent of programmers from the MAME team and from other contributors. Being able to play the games is just a nice side-effect, which doesn’t happen all the time. MAME strives for emulating the games faithfully. NOTE: This version includes an unsupported patch that adds the ability to display games at their original (-nativeres) resolution in fullscreen mode. Users of this version are not eligible for support on the official forum.
ScummVM is an implementation of the SCUMM (Script Creation Utility for Maniac Mansion) engine used in various Lucas Arts games such as Monkey Island and Day of the Tentacle. At this time ScummVM should be considered ALPHA software, as it’s still under heavy development. Be aware that while many games will work with few major bugs, crashes can happen. Also note that saved games can, and probably will, be incompatible between releases. Also ScummVM is capable of playing several non-SCUMM games.
http://pleasantfiction.ipower.com/ps3linux/ps3bodega61/ppc/repodata/repoview/scummvm-0-0.12.0-1.html
An emulator for a variety of Commodore 8bit machines, including the C16, C64, C128, VIC-20, PET (all models, except SuperPET 9000), Plus-4, CBM-II (aka C610)
QMC2 is a Qt4 based UNIX MAME frontend supporting SDLMAME.
A portable command-line driven, multi-system emulator which uses OpenGL and SDL. It emulates the following: * Atari Lynx * Famicom * GameBoy (Color) * GameBoy Advance * Neo Geo Pocket (Color) * NES (NTSC & PAL) * PC Engine * TurboGrafx 16 (CD) * SuperGrafx * PC-FX Mednafen has the ability to remap hotkey functions and virtual system inputs to a keyboard, a joystick or both simultaneously. Save states are supported, as is real-time game rewinding. Screen snapshots may be taken at the press of a button and are saved in the popular PNG file format. To play Atari Lynx games you will also need lynxboot.img which is not included for legal reasons.
http://pleasantfiction.ipower.com/ps3linux/ps3bodega61/ppc/repodata/repoview/mednafen-0-0.8.A-1.html
GnGeo is a NeoGeo emulator for Linux.
E-UAE is an Amiga Emulator based on UAE which attempts to bring all the features of WinUAE to non Windows platforms. E-UAE includes almost complete emulation of the custom chips, including AGA, bsdsocket emulation, JIT compilation for X86 processors, emulation of the 68000 to the 68060 as well as the FPUs.
DOSBox is a DOS-emulator using SDL for easy portability to different platforms. DOSBox has already been ported to several different platforms, such as Windows, BeOS, Linux, Mac OS X… DOSBox emulates a 286/386 realmode CPU, Directory FileSystem/XMS/EMS, a SoundBlaster card for excellent sound compatibility with older games… You can “re-live” the good old days with the help of DOSBox, it can run plenty of the old classics that don’t run on your new computer!
http://pleasantfiction.ipower.com/ps3linux/ps3bodega61/ppc/repodata/repoview/dosbox-0-0.72-1.rf.html
SheepShaver is a MacOS run-time environment that allows you to run classic MacOS applications. This means that both Linux and MacOS applications can run at the same time (usually in a window on the Linux desktop). If you are using a PowerPC-based system, applications will run at native speed (i.e. with no emulation involved). There is also a built-in PowerPC G4 emulator, without MMU support, for non-PowerPC systems. Available rebuild options : –without : mon –with : sdl
Basilisk II is an Open Source 68k Macintosh emulator. That is, it enables you to run 68k MacOS software on you computer, even if you are using a different operating system. However, you still need a copy of MacOS and a Macintosh ROM image to use Basilisk II.
Thanks to http://www.dcemu.co.uk for the news and the hint for the next few following ones.

AEP-Emu (DE/EN)
DMG Page (DE)
Indie Retro News (EN)
Retroguru (EN)