C#(read as 'C Sharp') is a simple, modern, object-oriented, and type-safe programming language derived from C and C++, which attempts to combine the rapid development ability of Visual Basic and the powerful flexible feature of C++. Programmers who understand the C or C++ will be able to become familiar with C# at once.
VisualBoyAdvance (VBA for short) is the number one, the most successful and most popular handheld emulator in the history of Game Boy Advance emulation. It is also one of the best video game emulators, and it's completely free and open source.
MAME (Multiple Arcade Machine Emulator) is a free, open source arcade game emulator for Windows users, it is also the most familiar to players from all over the world and one of the most commonly used game emulators.
Hamsterball is a classic rolling-ball style puzzle-action small game. In all sorts of sinister environments, players must agilely manipulate a hamster ball to escort the cute hamster to the destination within the required little time, and then challenge the more difficult next level.
ZSNES is an open source Super Nintendo Entertainment System (SNES) /Super Famicom (SFC) video game emulator for PC users, it has very high compatibility and supports Windows, Linux, FreeBSD, and MS-DOS.
If the Gens32 Surreal is now the best SEGA Genesis, Mega-Drive (MD) emulator for Windows only, then Gens is the earliest and best one for Windows and Linux all the time. And it's a cross-platform, open-source Sega Genesis / Sega CD/ MD / Sega 32X emulator for DOS/Win32/UNIX.
Here, I collected and packed 11 BIOS files (.bin) of SEGA Genesis, SEGA CD, Mega CD and SEGA 32X game consoles in one package, for the use of Gens emulator when you want to run Mega CD and Sega 32X games in it (you have to provided with the respective BIOS files).