The Recoll search results don't show up just on the Recoll lens but also on the home Dash, when performing a global search.(source and more information) The Wikipedia Lens is pretty self-explanatory: it allows you to search Wikipedia for various articles.
You can also filter by torrent type (music, video, ect.) and size.
Gets you a Map, the time, temperature and wind-speed in almost any city in the world for you in the dash.
Temperature is in Celsius and Fahrenheit and wind-speed is in kilometers/hour and miles/hour.
Recoll is a full text search desktop tool which indexes the contents of many file formats including Open Office, MS Office, Post Script, MP3 and other audio files, JPEG and more.
Besides regular searches, Recoll also lets you perform some advanced operations like searching for the author, file size, file format as well as operators like "AND" or "OR".
Unity Recoll Lens lets you use Recoll from Dash, without having to open any additional GUI.The lens comes with a few filters like Text, Spreadsheet, Presentation, Media or Message, but for more advanced searches, you'll have to manually enter the Recoll search query.Examples: author:"john doe" metallica OR megadeth /2007 (all documents from 2007 or older) dir:/path/to/dir (filters content from /path/to/dir directory). Once it finishes, log out, then log back in and you should see a new Recoll search lens.This question is present as a matter of historical interest.While you are encouraged to help maintain its answers, please understand that "big list" questions are not generally allowed on Ask Ubuntu and will be closed per the FAQ.The scope works using GCalctool – the default calculator installed in Ubuntu.