Discord.Net-Labs(archived) - An experimental fork of Discord.Net that implements the newest discord features for testing and development to eventually get merged into Discord.Net
DiscordUnity - A DiscordAPI made for Unity and only usable for Unity. It contains special features to make it all work.
Discore - A light-weight .NET library for creating Discord bots.
Disqord - Asynchronous Discord API wrapper and bot framework for .NET.
DSharpPlus - A .NET library for making bots using the Discord API.
Remora.Discord - A data-oriented C# Discord library, focused on high-performance concurrency and robust design.
DiscordCoreAPI - A bot library for Discord, written in C++, and featuring explicit multithreading through the usage of custom, asynchronous C++ CoRoutines.
discordpp - A Modularized C++ Library for the Discord API
DisCPP(archived) - Simplified, but feature rich Discord API wrapper written in modern C++.
DPP - C++ Discord API Bot Library - D++ is Lightweight and scalable for small and huge bots!
sleepy-discord - C++ library for the Discord chat client. Please use Rust for new bots
Clojure
discljord - A Clojure wrapper library for the Discord API, with full API coverage (except voice, for now), and high scalability
discord.clj - A Clojure library for creating Discord bots
ring-discord-auth - Fast and secure functions and ring middleware to verify ED-25519-signed Discord interactions
Common Lisp
lispcord - A client library for the discordapp bot api
Crystal
discordcr(archived) - Minimalist Discord library for Crystal. (Still WIP, but usable)
Discord.hs(archived) - Have you heard of our lord and savior Haskell?
Haxe
Haxicord - The most popular discord API Haxe library (because no others are good enough to be called a library)
Java
catnip(archived) - A reactive, fully-async Discord API wrapper for the JVM, built on RxJava 3.
discord-webhooks - Provides easy to use bindings for the Discord Webhook API
Discord4J - Discord4J is a fast, powerful, unopinionated, reactive library to enable quick and easy development of Discord bots for Java, Kotlin, and other JVM languages using the official Discord Bot API.
Javacord - An easy to use multithreaded library for creating Discord bots in Java.