Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Pusher Beams - Send push notifications programmatically at scale
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Truepush - Unleash limitless possibilities with Truepush and save up to $600 monthly. Free up to 10K Subscribers on all features.
CherryTree - A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
PushOwl - Re-engage website visitors with push notifications