StreamLottery is a tool that was developed because there was no comparable free tool for streamers. While there are some bots for Twitch that allow a giveway action, StreamLottery is more. StreamLottery integrates directly into your streaming software (OBS, XSplit, ...) and enhances the Giveway action with appealing animations.
There are three widgets that you can integrate into your streaming software:
For the nerds among you: StreamLottery was written with the Express Framework for node.js by Marc Schieferdecker (Let's Shoot). He's a streamer himself, basically developed it for his stream, and shares this software with you for free. Ideas for the further development of the tool are always welcome!