bitcoin-git. Feature branches that aren't yet, or never will be, ready for mainline bitcoin
139IBLT_Cplusplus. Invertible Bloom Lookup Table implementation in C++
57paymentrequest. Code for Bitcoin PaymentRequest/Payment/etc messages
52bitcoin_miningsim. Simple, fast, C++ bitcoin mining / block relay simulation code
46thresher. Smart contract to forward 'loose change' to Tornado.cash
20bitcoinxt. C++
19randomsanity_server. Random Number Generator sanity project
11scheduler. Lightweight C++ boost-based task scheduler class
5randomsanity_debian. Debian/Ubuntu script to sanity test /dev/urandom at startup
5python-bitcoinrpc. Python interface to bitcoin's JSON-RPC API
5