Party at the Knight Club, by Elisee & co: Somewhat short, but fun and puzzley, and certainly a valid use of the shapeshifting theme.  If you haven’t played it yet, stop reading my post and go do it.

Wood for the Trees, by ratking: Also short, but bloody amazing.  It’s not quite a puzzle, more of a riddle.  It’s also beautiful looking.  After you’ve beaten Party at the Knight Club, go play this and savor the experience.

The Creatures of Pflaumotopia, by Yazara: It’s a bit bare-bones in terms of gameplay and the likes, but still worth mentioning.  Not your usual MMO.  It’s more like a weird Spore-but-not thing – and it’s bloody awesome.  Keep an eye out for the Dorians, my species in it.

h3ss, by wboqm: It’ll bend your brain and leave you confused as heck, but it IS pretty dang cool.  I’m too rooted in standard X/Y/Z/ 3d-space, so I wasn’t even able to beat the first level.  Protip: Don’t be me.

And finally, some sameful self-promotion, don’t forget to play Shift, the entry I submitted.  If it reaches 25 votes, I can walk away happy this LD, though I would like to see it do better than my previous entries.