Matchkey

The goal in Robert Alvarez' game is simple - your purple blob needs to reach the portal in each level. The execution not so much since the portal is behind several locks. Keys are scattered around levels and you need to connect all keys of the same color to unlock the particular padlock.
Controlled by WASD/Cursor keys. R to restart, U/Z to undo. Autosave. 24 levels.

Eyedol Contact

Simple setting of RedTeapot's puzzler is quite useful - you can concentrate on thinking about solution and not get distracted. You need to tie parts of an eye together in a certain pattern and deliver it to the exit portals. Once you tie the parts together you aren't able to change the connection.
Controlled by WASD/Cursor keys. R to restart, T to skip a level (after several restarts).

Clump

Fajpaj's game is beautiful in all aspects - the color harmonies, the graphics overall quality, the soundtrack and the execution. To clear a level, you need to cover all blue lights at once. You can move around with an orange square and join it with it each red shape it touches. This way you create bigger shapes and can cover more lights.
Controlled by WASD/Cursor keys. Backspace key for reset. No autosave.

Tower Swap

Curtasic' crossover between match-3 and tower defense game is fun and higly addictive. By swapping tiles you create means of defence against dragons who attack at night. Notice, that any swap is allowed even if it doesn't make a match - but to create anything or upgrade it you need three same tiles at least. The game is available for mobile devices, too.
Controlled by a mouse.

Tower Swap (Android, Android Tablet)

Tower Swap (iPhone, iPod Touch, iPad)