dannnex

google sheets. I spend way too much time messing around with functions 

chess.com is fun, thanks for the recommendation Mr. Goat, have an internet point.

play.pokemonshowdown.com looks complicated but also fun, you get internet points too Truthless.

and I already knew about xkcd.com, but it still gets points for being a good recommendation. 

everyone else is an utter failure          /s

Video games work fine, but my answer stays as the Stock Market App