Another Regex Dictionary

http://wiki.tcl.tk/989

Regex for valid IP

http://stackoverflow.com/questions/106179/regular-expression-to-match-hostname-or-ip-address

http://www.regular-expressions.info/regexbuddy/ipaccurate.html

Java Regex

http://download.oracle.com/javase/1.4.2/docs/api/java/util/regex/Pattern.html

http://download.oracle.com/javase/tutorial/essential/regex/