1)   As-U-Type Speller 3.1
An OS-level real-time spell check software that checks and automatically corrects typographical and spelling errors for everything you type in all Windows programs. It learns your mistakes, adapts to your typing habit and becomes smarter with use.

 2)   ASPNet Spell 2.0
The AspNetSpell component provides an international spellcheck for your ASP.Net web forms. It includes familiar features such as Grammar & Personal Dictionaries. It looks and behaves like MS Word's Spellchecker. Compatible with ASP.Net 1.x & 2.0