This is a collection of Lua scripts for quick-and-easy string manipulation.
Obviously, you'll need Lua to run these scripts. To run the scripts ending in .wlua, you'll need the IUPLua library.
On Windows, you can get all this and more by installing Lua for Windows.
Outside of Windows, check your local package manager (which will most likely have packages for Lua- in fact, it's in the base install for Arch Linux) and/or Sourceforge (there are some good tips out there for setting up the files you can get from Sourceforge if you search for them).