Ning - Ning is the social platform for the worlds interests and passions online.

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

Padlet - Visual boards for organizing anything.

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

Snapchat - Real-time picture chatting

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