Twitter needs to create a better platform for international social media. That will save it's bottom line and place itself into a completely new market for enterprise accounts.
My team just went through trello, asana, and JIRA over the last three months. We came to the conclusion that Asana is the best combo between trello and JIRA.
If your team is heavy tech, then go JIRA, all other, I would say asana. Personal use, trello.