BotGhost - Create a discord bot without coding
Discord.js - A JavaScript library that enables the ability to code a Discord Bot.
MEE6 - MEE6 is a multipurpose Discord bot with moderation capabilities, leveling, Twitch alerts, and an easy-to-use online dashboard.
discord.io - A small, single-file, fully featured Discordapp library for Node.js and browsers.
Discord Bot Studio - Easily create your own custom Discord bots using a friendly user interface, no coding required!
Bastion: Discord Bot - Add Bastion to your Discord server and get an enhanced Discord experience!