Stars
pmacct is a small set of multi-purpose passive network monitoring tools [NetFlow IPFIX sFlow libpcap BGP BMP RPKI IGP Streaming Telemetry].
Basic data structures in C: list, set, map/hashtable, queue... (libstdc++ wrapper)
Simple autotools template for quick project bootstrapping
OpenFlow switch (multi-platform) - The OpenFlow eXtensible DataPath daemon,an SDN datapath framework written in C/C++
A light RINA implementation. Documentation is available in REAME.md (see below).
OpenFlow library set - Collection of libraries to build OpenFlow controllers and switches, written in C/C++. Hub repository.