TinyLetter - Start writing your own newsletter instantly.

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

MailChimp - MailChimp is the best way to design, send, and share email newsletters.

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

mailgen - Find the email address of anyone based on their first name, last name and company website.

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