Nice little puzzle game, appears to be a real challenge. The aim is to place all the pieces into the cube. The cube is 3 dimensional and the pieces can be added sometimes over the edge of the cube. Each side can only have one colour. Good luck! 
Simple puzzle (well the presentation and learning curve) but to solve it might not be that easy... Get the square to the x by moving it with the arrow keys.
Game was found at: Kongregate
Quick easy game. Hard to stop playing... 
A new episode of Submachine will always have its place here. Enjoy this logic adventure puzzle serie... 
Another escape game from Japan. Beautiful and hard, just as I like it. Challinging logical puzzles (so far... I havn't finished it yet). Enjoy! 
Pretty cool little game where the aim is to get the little ball into the black hole by rotating the whole playground. There are various obstacles in your way. 
Maybe you have seen this before, but this is the best one I have seen so far. Untangle the knots to advance to the next level. No line can cross another line. 