Fredboat - FredBoat is one of the best online music bots for Discord.
BMO - BMO is a music Discord bot that offers a wide range of high-quality music, games, memes, and other entertainment.
Vexera - Vexera is a multipurpose Discord bot that is truly something special and can change the way you enjoy your discord server.
Groovy - A dynamic language for the Java platform
Hydra - Project planning & management for professional services
ProBot - ProBot is an incredibly cool, customizable bot that lets you design your own bot server.