Extra features
Beyond the basic options, what else can the software do?
TimeSlotTracker can add custom attributes to a task or a time slot in the form of key/value pairs, so you can attach almost any type of info to a task or activity.
Timewarrior has integration features with Taskwarrior, a command-line text-mode task and to-do list manager. The configuration involves some work at the command line to copy files. Once up and running, when a task is started in Taskwarrior, Timewarrior begins tracking the time spent on that task.