The first startup I'm seriously trying to build: http://folkrobots.com
It's only a landing page at the moment, working on finishing the MVP within this month.
What I'm trying to build is a SEO tool that analyze your inbound traffic and gives you a list of keywords to target. It'll analyze the keywords and related keywords and check how competitive they are for you, automatically.
Give me lots of feedback please. If anything confuses you, please let me know.