I make apps!
Mobile apps that run off web databases that cache data locally, apps that give useful information based on where you are, even apps to help tired sysadmins at 3am deal with stuff quickly.
Web apps that match jobs to people, apps that help you explore data in ways you haven't imagined, apps that help manage customer data.
What app is next? Yours - web or mobile.
I also have written PagerBuddy, a tool to help people on call with PagerDuty to manage their alerts while they are out.