Fennel is a programming language that brings together the speed, simplicity, and reach of Lua with the flexibility of a lisp syntax and macro system.

Full Lua compatibilty: Easily call any Lua function or library from Fennel and vice-versa.
Zero overhead: Compiled code should be just as or more efficient than hand-written Lua.
Compile-time macros: Ship compiled code with no runtime dependency on Fennel.
Embeddable: Fennel is a one-file library as well as an executable. Embed it in other programs to support runtime extensibility and interactive development.
Anywhere you can run Lua code, you can run Fennel code.