Churn Calculator is a simple free tool for calculating your monthly & annual churn, as well as your customer lifetimes. We use it internally at ContentFly (http://contentfly.co/), so we thought we'd put it out for everyone!

Want to do keyword research but have no idea where the hell to start? We've built a Keyword Planner Generator that will give you a spreadsheet to plan your keywords, as well as 50 seed keywords to get you started.