1)   Spell Check Anywhere 6.0
Adds spell check to Outlook Express, Notepad, WordPad, Email, Word, Excel, PowerPoint, Instant Messengers, Custom Apps, To All Programs.

 2)   Intellexer Spellchecker SDK 3.0.0.17
Add spell checker capabilities to your Windows projects! With EffectiveSoft Spellchecker SDK this is easy. The development library contains a common DLL interface and interfaces for C++ and .NET with corresponding documentation and examples.