Best English Grammatical Knowledge Mozilla Addons Alternatives

Replaces random selected keywords either for a German or an English text with list of choices.
This is meant to improve your German or English grammatical knowledge.
The language of the Web page is detected automatically.

Highlights every form of the Spanish verbs 'ser' or 'estar' in any webpage and lets you see its conjugation.

generate summary from a web page and save to your knowledge base in www.ibrainext.com

General Knowledge in Hindi now available as Firefox extension.

Links Wikipedia to YAGO

Translate from English to Spanish, Czech, Danish, Dutch, Finnish, French, German, Indonesian, Italian, Japanese, Norwegian, Polish, Portuguese, Russian, Swedish and other languages, including pronunciation, synonyms, grammar and usage examples.

pick text from a web page and save to your knowledge base in www.ibrainext.com

Lavender converts gendered English pronouns to gender-neutral pronouns. For example, the sentence 'She loves strawberries' is converted to 'Ze loves strawberries'. Lavender helps you to read and learn 21st-century English.

For debugging entries in Windows event log, http://eventid.net/ is very helpful, e.g. by giving applicable Microsoft's knowledge base articles. However, unless you are a subscribed user, these are not linked from the pages--until you use this tool.

The SDL Clipboard Extension for copy/paste in your SDL Xopus, SDL LiveContent or SDL Knowledge Center editor.

Translate English words using double-click.

تبديل جملات فارسي تايپ شده با صفحه كليد در حالت انگليسي و بالعكس

Kifi allows you to easily keep and tag anything you find online, then quickly find it in your favorite search engine, together with relevant pages that your community and team have kept, too. Connect with Slack to deep search your channels' files.

Georgian-English and English-Georgian online dictionary.

Semantic Turkey: a Knowledge Acquisition and Ontology Management Framework.

Important: read developers' comments below to get to the download (for the right version)!

pcfault Toolbar helps you search the biggest IT knowledge database with almost 2 million questions and over 4 million answers spanning over 3 major IT categories: developers, administrators and power users.

Usage:
1) Press Ctrl Key and Double click on any word
2) Select any word with mouse and press Ctrl+Alt+Shift+G
3) Select any word with mouse and Right Click anywhere in document and click on 'Parevu English Gujarati Dictionary Translate'