Atlassian offers a $timulus Package: for only 5 days you can get JIRA and Confluence for $5 each for 5 users. All the proceeds will go to a charity, Room to Read (check the FAQ for the details). This is a fantastic deal for two great products, go get them!
Disclaimer: my company Ubiquitic is an Atlassian Service Partner. I can help you with both products.
P.S. Adaptavist steps up and is offering free licences of Them Builder and Community Bubbles for the Confluence Starter licencees.