Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
chitchat - Chat Room with Selfies and Pagers (yes, pagers!)
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Maker Mag - The first magazine for indie makers. 🚀
Sendtask - Sendtask is the easiest way to organize your work and collaborate online. Simple to use but powerful enough to run your business on it.
Founders at Work - Stories of successful founders