We started using excel for task lists and gantt, google drive, slack and whatsapp (yes, whatsapp). We tried Trello for the Kanban view. Lately we started using ZOHO Projects. So far its been great. Especially after their recent update. Its got all the functionality of EVERY tool I mentioned earlier. I, for one, am not a big fan of using Whatsapp for official communication, and post Zoho Projects, we only use Whatsapp to plan team outings :P

Its free. Give it a shot.