Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
BaseX - BaseX is a very light-weight, high-performance and scalable XML Database engine and XPath/XQuery...
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
eXistdb - High-performance native XML database engine and all-in-one solution for application building.