Focuster - Ditch your todo list for an intelligent scheduler
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Bookmark It - Create awesome notes on YouTube videos
Taskbook - Like Trello but for the Terminal
PageMarker - Save, organize, annotate and revisit your bookmarks