Hanano Puzzle is a puzzle game about flowers, stones and gravity. Its author announced it recently on the TIGsource forums. Caveat: there is only a Windows version.
posted by tykky on Sep 30, 2011 - 8 comments

Friday Flash Fun: Color Theory is a puzzle platformer about... um... color theory. And gravity switching. And aliens. Via the eternal font of pleasant time-wasters, jayisgames.
posted by macmac on Aug 6, 2010 - 19 comments

Cogitate - Manipulate LEGO TECHNIC gears, beams, conveyor belts and motors to complete the ten pre-built puzzles or create your own levels. [In my case - Then watch them crash in a heap when you test them.]
posted by tellurian on Jun 4, 2009 - 15 comments

Friday Flash Fun: Green Moon Lab! Manipulate gravity and momentum to get to the exit in this sleek, simple, Portal-esque physics puzzler. Contains twenty levels plus an unlockable challenge mode. A little weak in the writing department, but the drunken swooping gameplay more than makes up for it. (via)
posted by Rhaomi on Mar 13, 2009 - 16 comments

Epsilon. A flash puzzle game with portals, time & gravity manipulation. (via JiG)
posted by juv3nal on Jun 3, 2008 - 17 comments

This is a Flash drawing toy involving gravity.
posted by shakespeherian on Jan 12, 2008 - 59 comments

[Friday Flash Fun] Gravity Pods, a physics-based shooter/puzzle where you use special gravity pods and repellers to alter the course of a projectile and avoid barriers to hit a target.
posted by aerotive on Jul 27, 2007 - 25 comments