With Liquid (was Liquid Flow), you flow through your work effortlessly and quickly by doing the things you need to do every way - looking up words, sharing information, translating, copying, calculating and converting. When you interact with your information through your computer smoothly, not in little bits and dribs and drabs, your work becomes liquid and you work in a new, more connected state, you flow.
Select text, type Cmd-Shift-2, and choose a command.
Note: While the software is classified as free, it offers in-App Purchases. An in-app purchase allows you to upgrade to Liquid Pro, which adds translation and custom search functions.