Spell check is a necessary feature of whichever program you use for writing text. Occasionally you need to check spelling in an application that does not include a spelling checker and you don’t want to launch your word processor just for that. I definitely need a spell checker in all my programs mostly when sending instant messages to my friends . Enso Words and TinySpell are small utilities that allows you to easily and quickly check and correct the spelling in any Windows application
Enso Words gives you spell-check power for all of your favorite programs, from Microsoft Word and Mozilla Firefox to Macromedia Fireworks. It’s so simple and elegant, that it feels like magic. Enso is free and runs on Windows 2000, Windows XP, and Windows Vista.
tinySpell can watch your typing on the fly and alert you whenever it detects a misspelled word. It can also check the spelling of text that you copy to the clipboard.
tinySpell installs itself in the system tray for easy access. It comes with an American-English dictionary containing more than 110,000 words. This is a freeware (totally free – no adware/spyware/nagware/etc.)