My work from studying Structure and Interpretation of Computer Programs. I use mit-scheme.
Oliver Caldwell (@OliverCaldwell)
Find the full unlicense in the UNLICENSE file, but here's a snippet.
This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.
Do what you want. Learn as much as you can. Unlicense more software.