use cases:

• build a small ce router
• build a medium ce/pe router
• build a big pe router
• build a (geo)distributed p/pe router
• build a controller for openflow or p4lang switch
• build a controller for a chassis, stack or a whole dc
• build a bridger for your wifi aps' layer2 tunnels
• build a stateful firewall with optional tls sni filtering
• build a stable service with config syncing redundancy
• build a sniffer terminating eompls/erspan tunnels
• build a summary/blackhole/flowspec originator
• build a flowspec rewriter
• build a route reflector within an isp
• build a bestpath conqueror route reflector
• build a attribute filtering route reflector
• build a route server within an ix
• build a route comparer for rr/rs sanity checks
• build a nrpe provider for your management system
• build a voip tester with the sip modem server and client
• build a mesh probe system for your network
• build a bmp collector for table research
• build a sanity checker of your or partner bgp from bmp
• build a route beacon originator or ghost route hunter
• build a packet/prefix/mrt injector for testing
• build a router image blackbox tester
• build a lab to try out your concepts
• build a hijack detector from bmp feed
• build a prefix visibility detector from bmp feed
• build a prefix logger from bmp feed
• build a prefix logger from your igp/bgp feed
• build a flap detector from your igp/bgp feed
• build a spf logger for your igp

and so on... if you miss something, get in touch...