filekit is a Lua library written in MoonScript that simplifies the methods used by LuaFileSystem and adds a bunch of other functions for checking whether files exist, getting octal permissions... It also serves as a drop-in replacement for the ComputerCraft FS API, so you might be able to write programs compatible with both platforms now.
See the documentation here.
This project is Unlicensed, and released to the public domain.
goodbye.