ActiveCollab

ActiveCollab is one of the best, if not the best project management tool that I have ever used and I have jumped from one to another tool for different projects and project types.

If offers so many features, perfect dashboard, milestone preview, calendar, planner, contact details, time tracking and much more.

While it is perfect for managing many different types of projects, this is still not the perfect tool for managing software development projects. The only reason for that would be, there is no (or that was not back then) an integration with Git or other version of control system. It was simply a missing feature back then.
I truly hope that nowadays the ActiveCollab team managed to improve and integrate such feature, but talking 6-7 years ago, that was the only downside that I can say about it. If for some reason that is still not available and you are into software development business, look for something else like Asana or Bitbucket.

We have a global team that work on projects together, ActiveCollab keeps us progressing them.
We also use it for collaboration, requests and idea sharing.

Usiamo Active Collab per gestire i task e in generale tutta la comunicazione col cliente sui progetti in sviluppo e in assistenza. Ci ha semplificato molto l'organizzazione della comunicazione eliminando gli interminabili (e incomprensibili) flame di email

We ended up transferring from ActiveCollab to Teamwork fairly quickly because it caused some business problems for us. Issues were missed (especially subtasks), and we lacked the reporting structure we needed to keep a good grasp of resourcing and individual task progress. The time logging structure was also a pain point compared to alternate software options we've since pursued.

I have used a lot of project management software between different jobs and Active Collab has by far been the easiest, most straightforward, and practical. I love how streamlined it is. I've used far too many software that try to do too much at once and there are WAY too many buttons and options to complicate things. Active Collab gets the balance right between offering lots of features and keeping the interface user friendly. While there are a few features I wish this had, Active Collab has been great at listening to their users by adding requested features. I greatly appreciate it!