Cash App - The easy way to send, spend, bank, and invest.
CMake - CMake is an open-source, cross-platform family of tools designed to build, test and package software.
Facebook Pay - Send money to your friends via Messenger
GNU Make - GNU Make is a tool which controls the generation of executables and other non-source files of a program from the program's source files.
PayPal.Me - Request money using your own personalized URL.
Leiningen - Leiningen: automating Clojure projects