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.
Drawbase Enterprise - Drawbase Software is the leading provider of both web and client based solutions to manage corporate real estate, facilities, assets and support services more efficiently and improve workplace execution.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
EZmaintain - CMMS for medium to large plant & facility maintenance
Basecamp - A simple and elegant project management system.
QuickFMS - Facility Management and Real Estate