We use it (and LOVE it) at AboutUs.org (Portland start-ups represent!). Here's what our CTO said: “I've waited 15 years for a computer program that out-perform

We use it (and LOVE it) at AboutUs.org (Portland start-ups represent!). Here's what our CTO said: “I've waited 15 years for a computer program that out-performs index cards. Pivotal Tracker's smooth interface and network-native architecture supports my team's collaborative/distributed planning without giving up the simplicity and physicality of cards. This product had to come from a team that understands how I work. ” - Ward Cunningham, CTO, AboutUs.org