Sanebox - SaneBox is a cloud-based service that allows users to filter and manage their emails.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

MailCleaner - Cloud & on-premise anti spam software for businesses

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

Hornetsecurity Spamfilter - Hornet security Spam filter is a spam filter service created to help businesses detect and protect mailboxes from spam, malware and viruses using a variety of features such as spam recognition and virus detection, adjustable content filters, and sta…

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.