2Tangos is an Israeli knowledge bank that offers location-based connections for online tandem learning. Users can pass on their skills in return for someone else’s knowledge: cooking secrets for German classes, guitar for sculpting etc.

An new iPhone app called Yellowbrck is trying to become the Foursquare for parents looking for fun activities with their children. Just like Foursquare, YellowBrck comes complete with check-ins and badges – but the best part is that parents can actually earn coupons and reductions at stores.