A work in progress compiler for the programming language Kitten made by Jon Purdy. More information can be found on the language's website kittenlang.org.
With nip being written in modern C++14, a modern compiler is needed. Currently, g++-4.9 and clang++-3.5 are the earliest that nip compiles with. This may INCREASE, as a few C++17 features may start to be integrated.