Design You Trust is a design blog and community that allows public posting like MetaFilter. Recent posts that I found interesting include Diz Decor Vinyl Stickers and Tetris Furniture and A Man Among Bears. This is an active community with several daily posts to choose from. [some posts nsfw]
posted by netbros on Apr 27, 2009 - 7 comments

Rumplo will help you waste even more of your hard-earned cash on artist and designer created T-Shirts. You can submit shirts you've found anywhere online, as well as comment on and favorite other people's findings. Thanks to user-submitted tags, you can browse by color, type ('boys', 'girls', 'kids'), and many other attributes. If you get bored of browsing aimlessly, you can always check out what's popular.
posted by defenestration on Jul 12, 2008 - 37 comments

Super(-expensive) Playgrounds are nice to look at, but what makes a playground fun? Experiments in play: Snug & Outdoor (1, 2, 3) Mcdonald's (1, 2, 3) KaBOOM! (1, 2, 3) Boundless Play (1, 2, 3)
posted by anotherpanacea on Apr 22, 2007 - 34 comments

The Open Architecture Network "is an online, open source community dedicated to improving living conditions through innovative and sustainable design." {via Cameron Sinclair's Ted Talk}
posted by dobbs on Apr 14, 2007 - 6 comments

Stains on paper.
posted by dead_ on Sep 14, 2006 - 15 comments