outlook checker

Gmail/Yahoo mail account status widget.

REALbasic class for devs to add spell checking to their apps.

Website broken-link checker and more.

Virus checker based on ClamAV.

Speaking email checker for Apple Mail.

Faster Mail.app spell checker.

XML and XHTML checker.

Spell checker.

System wide Icelandic spell checker for Mac OS X.

Multi-document spelling checker, LaTeX-aware.