Free and Open Source spell checker used as a library or as an independent spell checking tool.

Offers a free online grammar checker that also pinpoints errors in spelling and writing style.

Provides a free grammar and spell checker, articles, tutorials, vocabulary games and more.

Features an advanced grammar and spelling checker for proof reading documents.

Free Internet Explorer browser extension that spell checks text entered into boxes on a web page.

Provides an interactive spell-checking program for Unix which supports a large number of European languages.

Spell checking component for JavaScript designed for spell checking web forms and variables, Ajax spell checking, and real-time spelling validation.

Browser and server spell checking tool for the Java J2EE Platform, IIS ASP .NET Web Server, AJAX JavaScript, HTML, PHP,Oracle Forms, and Lotus Domino. Offers online demonstrations.

Checks for grammar and spelling mistakes in English texts, and provides suggestions for improvement.

Windows and Mac spell checking and writing software designed to work with any program and supports shorthand typing and and custom dictionaries.

Provides a spell check button to Windows programs along with an English dictionary.

Offers spelling checker software tools for the medical, pharmaceutical, veterinary, legal, bioscience, dental, botanical, geographical, engineering, and scientific industries.

Small standalone spell checking application available in freeware and premium versions.

Provides spelling checkers as well as dictionaries, word lists, thesaurus, and grammar checking software products.