I don't see one of these yet, so here's the question for the proposals for the June 2016 Community Challenge! (I skipped May, as there wasn't enough time to get a good pool of suggestions.) --- It's time to choose a [tag:community-challenge] for June 2016. * Post your challenge as an answer to this question. Feel free to resubmit non-winning ideas from previous months. * Vote for those answers which interest you. * At the end-of-day on Tuesday, May 31st, the top-voted post will become the next challenge. Once the challenge topic is decided, post your solution as a [question on the main site][2] and tag it with [tag:community-challenge]. The challenge runs throughout June (but nothing stops you from posting an entry later on). [2]: https://codereview.stackexchange.com/questions/ask