I really like the aesthetics of Deborah Oropallo‘s digital collages.

found at triangulation blog

YouTube (Staring at the Wall) by Helmut Smits.

found at rebel:art

Daniele Del Nero made a series of architectural scale models with black paper, which he then covered with flour and some small samples of mold. After some time they started to look like this. Beautiful!

found at The Fox Is Black

Frankenlovely is a series of photo collages made by Lee Gainer. She used photos from fashion magazines to create these faces.

found at designboom weblog

Gordon Matta-Clark was an American artist known for this site-specific artworks like his series of building cuts, where he removed sections of floors, ceilings, and walls in abandoned buildings. “Conical Intersect” was one of his project which he did during the Paris Biennale in 1975. You can find a video about it here.
You might also want to have a look at Turning the Place Over by Richard Wilson.

found at kiameku

One Hundred and Eight is an interactive installation made by  Nils Völker. It’s made out of ordinary garbage bags which can be selectively inflated and deflated by two cooling fans.

Although each plastic bag is mounted stationary the sequences of inflation and deflation create the impression of lively and moving creatures which waft slowly around like a shoal. But as soon a viewer comes close it instantly reacts by drawing back and tentatively following the movements of the observer. As long as he remains in a certain area in front of the installation it dynamically reacts to the viewers motion. As soon it does no longer detect someone close it reorganizes itself after a while and gently restarts wobbling around.

found at CreativeApplications.Net

I don’t even know how to describe these 3D paper artworks made by Katsumi Hayakawa.

found at triangulation blog

“Movements with defective selection tool” by Alice Leonards.

found at PAINTED,ETC.

Blingee (Kazimir Malevich) by Jaakko Pallasvuo. Made with … Blingee.

And a bonus: Blingee (Sol LeWitt)

found at Rhizome

Tessel is a kinetic installation investigating the perception of sound and space made by David Letellier & Lab[au]. A 4 by 2 meters big mirror is divided into 40 triangles. Twelve of them are fitted with motors and eight triangles are equipped with audio transducers, which transform the surface into a dynamic sonic space.

found at CreativeApplications.net