Popular cross-platform todo app Wunderlist has finally arrived on the BlackBerry PlayBook. We saw Wunderlist sneak onto BlackBerry a few months back and now on the PlayBook as well. Wunderlist is a todo list app that works across multiple platforms so it's available when and where you need it. It's super easy to use, lets you create multiple lists, share items and best of all is totally free. I've been a big fan for quite a while and I'm pumped that an official client is now on the PlayBook. Head to the link below to download.