You don't need any special tools for supporting Agile/Scrum. A box with PBIs written on paper cards and a task board representing the sprint backlog items (with magnetic cards and/or post its, showing the PBIs the Todo, In Progress, Done and Closed statuses) might do the trick. But for sure that productivity (and auditability, collection of metrics, etc) will be empowered by supporting tools like JIRA or other. The market is moving around this opportunity and so new things appear everyday.
For instance / for future reference:
"SOCOCO is THE online place where Agile teams get work done. Distributed Agile teams go to work in Sococo. It recreates the personal proximity and functionality of a physical office in an online experience. "
So they say here in the Web site where a free online space can be created. For details:
https://www.sococo.com/
