I was looking for something to track my typing and general computing throughout the day and came across this really cool open source project. It runs locally so there is no exposure of what amounts to pretty sensitive data. The charts are really great, the UI is basic, but does the job. It's also customizable so you can group different apps, write notes to explain certain data points, or provide context for a certain day, etc. The README is also really clear and the code is well documented making it pretty easy for even a novice developer to customize it.
