ftak

ftak is a free Chrome extension for looking things up without leaving the page you are reading.

Double-click or drag over any word or phrase and a small tooltip appears with:

• the meaning, grouped by part of speech
• a short factual summary from Wikipedia for people, places, events and ideas
• a map preview when the word is a place

Click away and you are back to reading. No new tabs, no copy-paste, no sign-up. The site also has a PDF reader where you can look up words the same way.

For UPSC aspirants, ftak can show related previous-year UPSC questions for text you select in news articles (a few free every day, sign in for more).

Good for students, researchers, people reading in a second language, and anyone who reads a lot online.