Seeing how im advocating that everyone should know when to be using parsing tools rather than cobbling together a regexp cludge, here are some links to some relevant tools in a variety of languages. Note that these are not parser generator tools, but parser combinator libraries:
* Python:
PyParsing - http://pyparsing.wikispaces.com/ - this
is probably the most well respected parser library
for python
picoparse - http://github.com/brehaut/picoparse - My
parsec inspired parser combinator library. It is
significantly more light weight than pyparsing, and
I would recommend pyparsing in its place for more
heavy lifting parsers.
* Ruby:
RParsec - http://rubyforge.org/projects/rparsec/ - A
ruby implementation of Parsec. I've heard good
things about it.
* Haskell:
Parsec - http://legacy.cs.uu.nl/daan/parsec.html -
This is an amazing library, worth anyones time.
http://book.realworldhaskell.org/read/using-parsec.html
http://www.haskell.org/haskellwiki/Parsec
* F#:
FParsec - http://www.quanttec.com/fparsec/ - This is
reason enough to learn F#; it is a fairly true port
of the haskell library and very nice to use.
* Scala:
Packrat Parsing - I believe this is part of the
standard lib. http://www.scala-lang.org/docu/files/api/scala/util/parsing/combinator/PackratParsers.html
* Clojure:
fnparse - http://github.com/joshua-choi/fnparse
* Java:
jparsec - http://jparsec.codehaus.org/