Mupen64Plus - N64 emulator and plugins for Linux, Mac OSX, FreeBSD, and Windows
RetroArch - RetroArch is a frontend for emulators, game engines and media players.
Project64 - Project64 is a Nintendo 64 emulator for the Windows platform.
Playnite - Source code generated using layoutit.com
1964 - 1964 is a Nintendo 64 emulator for Microsoft Windows, written in C and released as free software.
Batocera.linux - Batocera.linux is an open-source and completely free retro-gaming distribution that can be copied to a USB stick or an SD card with the aim of turning any computer/nano computer into a gaming console during a game or permanently.