I recently released Downpour, an app that anyone can use to make little games on their phone. And before that I made Cheap Bots, Done Quick, a website that anyone could use to make a Twitterbot on their computer. And so unsurprisingly I am a big advocate of making creative tools - I love the feeling of seeing other people make cool stuff, and knowing that I enabled that to happen. In this talk, I'm going to talk about some design principles I've gathered from making these kinds of things, share some stories of people using them in ways I didn't expect, and generally try to persuade you that it's an interesting space that you might want to play in.