Odoo - An all-integrated business app suite to unleash your growth potential.
Nifty - Manage projects, work, and communications in one place.
Infor ERP - An ERP suite for the manufacturing & distribution industries
Flow - Stop managing projects from your inbox.
Adempiere - ADempiere is a commons-based peer-production of Open Source ERP Applications.
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.