Bookamat - Powering the world's best independent fitness, Pilates and yoga studios.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

appointman - Online booking solution for gyms and studios

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

Glofox - Powerful Gym and Studio Management Software.

Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.