Workonomic.cc was built because I was unhappy with any tools I tried for tracking time. The goal is to offer very efficient time tracking. Efficient in time and brain cycles.
We do this by bringing our "app" to "where your work is", and using the most natural form of tracking for that mode. GTalk chat bot is just one of the input interfaces available.
Workonomic.cc is in Alpha stage, but already has some real (brave) users.