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.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Instagantt - Instagantt is a powerful and intuitive Gantt chart tool to enable teams to plan, manage and visualize their projects easily. Manage your schedules, tasks, timelines, and workload like a Pro. Try it for free.

Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors

Manifold - Manifold GIS is a combination of mapping, CAD, DBMS and image processing.

Zendesk for Startups - Everything you need for seamless customer conversations.