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.

SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.

KanbanFlow - KanbanFlow is a Lean project management tool allowing real-time collaboration between team members. Supports the Pomodoro technique for time tracking.

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

Meistertask - MeisterTask is an intuitive task management and collaboration tool.

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