If you haven’t ever used Trello, then you should try it today. It’s a free tool that is great for project management, content calendaring, and team collaboration. We have used Trello internally and with clients and definitely recommend it to others. Here’s an article about how a marketing company uses Trello to create multi-client content calendars using Trello.
Trello

Alanna Jackson is a founding partner at Jackson Marketing Services, a marketing firm located in Dunedin, Florida. In addition to her work at Jackson Marketing Services, Alanna is a founding member and editor of RabidOfficeMonkey.com. You can follow her on Twitter @alanna_jax. and on Google+.