MicroEmulator - MicroEmu is a pure Java implementation of Java ME.
Cemu - Highly experimental software to emulate Wii U applications on PC.
Wii Backup Manager - Manage Wii backups on your external hard drive and more..
JBlend - JBlend is an application that allows you to install Java apps on Android phones.
Witgui - Witgui is a free Wii and GameCube game manager for macOS. It is a graphical user interface based on wit (http://wit.wiimm.de/wit), wwt (http://wit.wiimm.de/wwt) and the gametdb.com database. You will love its intuitiveness.
RetroArch - RetroArch is a frontend for emulators, game engines and media players.