D++ is a lightweight and simple library for Discord written in modern C++. It is designed to cover as much of the API specification as possible and to have a incredibly small memory footprint, even when caching large amounts of data.

Support for Discord API v10
Really small memory footprint
Efficient caching system for guilds, channels, guild members, roles, users
Sharding and clustering (Many shards, one process: specify the number of shards, or let the library decide)
Highly optimised ETF (Erlang Term Format) support for very fast websocket throughput (no other C++ Discord library has this!)
Slash Commands/Interactions support
Voice support (sending and receiving audio)
The entire Discord API is available for use in the library
Stable Windows support
Ready-made compiled packages for Windows, Raspberry Pi (ARM64/ARM7/ARMv6), Debian x86/x64 and RPM based distributions
Highly scalable for large amounts of guilds and users