Snap Tools is a script for 3ds Max developed by Jon Seagull. It adds two actions to the customize menu of 3ds Max, giving you commands you can assign directly. Each action can be bound to a keyboard shortcut or placed in a quad menu.
The first action cycles the snap mode. By default it skips 2D, and that default can be adjusted. The second action opens the Snaps dialog. These two actions are the core of what Snap Tools provides.
Snap Tools comes from Jon Seagull, a consultant and technical director who works on the technical side of 3D pipelines, including custom tool creation and scripting. The script is listed on ScriptSpot and appears here as free. A demo video is available, and more information can be found on Jon Seagull's page at jonseagull.com. For current licensing, check the developer's page directly.