There's also ALIVE and AFIT (actifit) but I don't know anymore how they're have to be used...
And there's Posh, but for this you need to post as well on Twitter and get retweeted and liked within 24h. That's a bit of pain. I did it before, asking some people to like and retweet but it's all the time asking for favours, you know...
RE: Lake Louise