EmuNations

VirtualBox is a powerful x86 and AMD/Intel64 virtualization solution for home and enterprise usage. It's quite feature rich, high performance yet is freely available as an Open Source Software. While it's mainly a community effort, Oracle is backing it to ensure it maintains high standards of quality...

It is an open-source Dreamcast emulator for Windows considered among the best in regards to accuracy. Its capable of running any Dreamcast game, even some none-commercial games...

SSF is a closed-source emulator known for its high compatibility and considered to be superior to Yabause and Mednafen. It's able to run most Saturn games without issues, but requires mounting ISO files in a virtual drive.