A simple Time Tracker. It aims to stay basic and intuitive, with a focus on keyboard usage.
You can download binaries for your platform from https://github.com/pm98zz-c/tT/releases.
Start by free typing your current activity in the main input field, and press Enter to start the timer. See also the keyboard navigation reference: https://github.com/pm98zz-c/tT/blob/master/Keyboard.md.
To delete an existing time entry, either "blank" the task description, or set the start and end time to overlap.
You can enable pulling tasks from a Redmine server by entering credentials in the Edit > Preferences panels. Note this is uni-directional and only pulls the issues from Redmine for auto-completion. It does NOT create time entries from local records.
You have to generate an API token from your profile (/my/account) on your Redmine instance.