1. PacketserialAn Arduino Library that facilitates packet-based serial communication using COBS or SLIP encoding.
2. OfxhttpA suite of HTTP tools, including clients and servers for openFrameworks.
3. OfxspatialhashA collection of 2D/3D spatial hashing algorithms. Useful for quick nearest neighbor calculations.
4. OfxioA collection of I/O core utils including a directory watcher, file filters and ordering, compression and more.
5. OfxjsonrpcJSONRPC Implementation using openFrameworks events, WebSockets, etc.
6. OfxgeoA set of utilities and classes for common geographic tasks.
7. ofxClipperAn openFrameworks wrapper for Clipper - "an open source freeware polygon clipping library".
8. ofxUnicodeAn openFrameworks addon that wraps various Unicode algorithms.
12. IPCAM2SYPHONAn bridge that converts multiple IPCam video streams to Syphon textures.
13. ofxFontAn extensible typography framework featuring layout, Unicode, drawing in ofPaths, and much much more.
14. ofxDlibAn openFrameworks wrapper for dlib. http://dlib.net/
16. ofxMapsA slippy map addon. Based heavily on modestmaps-of.