Access your computer from anywhere

This looks pretty cool. I used to pay for logmein a while back and found it to be a) expensive and b) a bit bloated (it did a whole ton of stuff I didnt need, when really I just want to be able to quickly access my imac from my iphone on the move, and I do that very rarely but when I need to do that it always pains that a good solution doesnt exist). Whats the current competition to this out of interest?
Screen Sharing and VNC client that lets you connect back to your Mac, Windows or Linux PC from the comfort of your living room, the corner coffee shop or anywhere in the world.