This is pretty much just my easy alternative for people who want simple physics in their platform games but for some reason don't want to mess around with gmphysics. The gimmick in this physics engine is that it's also an engine for a game in which the character manipulates objects via telekinesis, so I guess this is a starting point for that awesome psychic game you've always wanted to make. Everything else you need to know is told to you ingame and in the source comments.
Download link: Platform Physics.GM6 (.GM6 pro source)
This is a simple rigid physics engine I whipped up in a couple of hours. It's not entirely bug free, but it should do anything you need it to do.
Download link: Rigid Physics.GMK (.GM7 pro source)