Ruby Links (and some tk ones)

http://approximity.com/ruby/rubytk.html

Ruby-tk wiki in japanese

http://www.vandomburg.net/pages/mysql-ruby-windows

http://www.poignantguide.net/ruby/

a QuickGuide To SQLite

http://www.ruby-doc.org/

http://tryruby.hobix.com/

http://www.ruby-lang.org/en/

http://www.rubycentral.com/

http://www.rubyforums.com/forumdisplay.php?f=1

http://www.ruby-forum.com/forum/4

http://www.jbrowse.com/text/rubytk_en.html

http://www.tcl.tk/man/tcl8.4/TkCmd/contents.htm

http://members.chello.nl/~k.vangelder/ruby/learntk/hello.html

http://rubyforge.org/

http://freeride.rubyforge.org/wiki/wiki.pl?HomePage

http://rubyforge.org/projects/rubygems/

http://www.rubyist.net/~slagell/ruby/

http://www.ruby-doc.org/core

http://www.ruby-doc.org/stdlib

http://www.ruby-doc.org/doxygen/current/

http://www.trug.ca/Ruby/Qt

http://phrogz.net/ProgrammingRuby/ext_tk.html