International Phonetic Association - The website of the organization that created the International Phonetic Alphabet. - http://www2.arts.gla.ac.uk/IPA/
Say... - Text-to-speech translator which also reads ASCII representations of the IPA. - http://wwwtios.cs.utwente.nl/say/
International Phonetic Alphabet (IPA) Unicode “Keyboard” - A Unicode replica of the official chart written in XHTML/CSS and released under the GPL. Allows the user to type strings of IPA characters while keeping track of previously used symbols and optionally outputting XML entities. - http://www.linguiste.org/phonetics/ipa/chart/keyboard/
IPAScript - Description and online Demo of an input system for generating IPA symbols from SAMPA (Ascii) keystrokes - http://www.elgin.free-online.co.uk/is_intro.htm
A Sound Reference to the IPA - Interactive IPA chart that includes examples of sounds. - http://www.ling.hf.ntnu.no/ipa/full/
The IPA in Unicode - Unicode standard used by current browsers covers all the IPA phonetic symbols. Listed with their meanings, codes, and advice on Unicode fonts that contain them. - http://www.phon.ucl.ac.uk/home/wells/ipa-unicode.htm