x-callback-url Library
A collection of apps with x-callback-url support and their documentations
GoodTask
Recommended
GoodTask extends Reminders to a powerful task manager. Look through your tasks on gorgeously designed List, Day, Week and Month views.
TextTool 2
Recommended
TextTool makes it easy to manipulate text through powerful built-in transformations.
Workflow
Recommended
The set of tools you need to build the most powerful workflows and boost your productivity.