ruby2ruby by seattlerb (a library for generating s-expressions from ruby and then turning those back into ruby), formerly at http://seattlerb.rubyforge.org/ruby2ruby, can be found at https://github.com/seattlerb/ruby2ruby
Perhaps more generally, seattlerb, formerly at http://seattlerb.rubyforge.org` could be redirected to https://github.com/seattlerb/ and it seems like any seattlerb.rubyforge.org/<project> shaped url could be redirected to https://github.com/seattlerb/.
ruby2rubyby seattlerb (a library for generating s-expressions from ruby and then turning those back into ruby), formerly at http://seattlerb.rubyforge.org/ruby2ruby, can be found at https://github.com/seattlerb/ruby2rubyPerhaps more generally,
seattlerb, formerly at http://seattlerb.rubyforge.org` could be redirected to https://github.com/seattlerb/ and it seems like anyseattlerb.rubyforge.org/<project>shaped url could be redirected to https://github.com/seattlerb/.