Bad news. The server hosting The Ruby Toolbox went bust on the evening of June 7th. While I do have backups, the
original source code is in a very outdated state so I currently don't feel it makes sense to try and get it running again.
For the time being, here is a very stripped down version of the Ruby Toolbox's contents.
This module allows Ruby programs to interface with the SQLite3 database engine (http://www.sqlite.org). You must have the SQLite engine installed in order to build this module. Note that this module is only compatible with SQLite 3.6.16 or newer.