a similar app,
- Gurunet (FREE version and Paid version available.) a 1-click referrence tool, look up words, facts, spell-checker, thesaurus and word translations, accessed by Alt-clicking on any word or phrase in any Windows document. With a single click on any word, GuruNet delivers valuable real-time and reference data, including encyclopedia and dictionary terms, thesaurus, acronyms, tech terms, quotations, idioms, people, company descriptions, stock quotes, news, sports, weather, maps...
http://www.gurunet.com/page.pl