This is an amazing client-side tool for building contraptions with extreme precision, aligning objects for either aesthetic or functional perfection...To accomplish this task a grid is projected onto the object you are pointing at and by pressing the use-button your weapon will lock onto that point and allow you to place objects with pin-point accuracy. For all entities be them square, round or uneven this tool will bring you perfect precision. This is a remake of the classic AutoSnap with a multitude of improvements. We all loved AutoSnap, and since the development of it had almost come to a halt, I decided it was time to bring it back to life. The code has been written from scratch.
Latest version available here: http://www.facepunch.com/threads/322155-SmartSnap-%28snap-the-mouse-to-objects%29