The Enchant library is to the spelling libraries what MDB2 is to the databases, a nice and working abstraction layer. it is developed by Dom Lachowicz from Abisource.com . It provides a simple and powerfull API to work with many spelling tools.
These tools include Aspell/Pspell, MySpell/Hunspell, Hspell, and AppleSpell. Enchant is looking to replace each of these layered under a nice, clean abstraction layer.
Pierre also notes an update he's made to the PHP binder:
The PHP binder is already more than one year old and is trying to make its place in the php world. I just released a maintaince release (1.0.1), it adds a function to get a list of available dictionaries (enchant_broker_list_dicts).