What are some alternatives?
When comparing Tomighty and Gnome Pomodoro, you can also consider the following products
YAPA - Pomodoro timer
Pomello - Pomello turns your Trello cards into Pomodoro® tasks.
Tomatoes - A time tracker inspired by the Pomodoro technique®.
Pomodone - Pomodone is the easiest way to track your workflow using Pomodoro technique, on top of your current task management service.
Pomodairo - An Adobe Air application for working with the Pomodoro technique, ...
Pomotodo - Todo-list based on Pomodoro technique.