Vitalist was created to bring GTD principles into modern web-based software. Vitalist implements every step of David Allen’s GTD methodology so you don’t have to keep track of it yourself. No more painstaking updates of documents, spreadsheets, or paper to-do-lists. With Vitalist, your lists are online, in GTD format, and ready to be accessed or updated from anywhere. You can even access Vitalist from your iPhone or mobile. Sign-Up for Free.