| libCBOR | A CBOR (RFC 7049) processing library. |
| LiteOSCParser | A lightweight OSC processing library. |
| QNEthernet | An lwIP-based Ethernet library for Teensy 4.1 and possibly some other platforms. |
| SLIPStream | A decorator for Stream objects that sends and receives SLIP. |
| TeensyDMX | A full-featured DMX library for Teensy 3, Teensy LC, and Teensy 4. |