What app or service could you not live without (work or non-work)?
I personally couldn't imagine life without twitter. I use it to keep up-to-date with professional developments, and personal interests. It's a very pleasant experience if you curate your follow list correctly and interact with others pleasantly (I'm @hooHar if you want to follow me!)
How about you? A to-do list manager, roam, Evernote, Blinkist? Share below!