[Trisquel-users] Is PyCharm free software?

[vitacell]

Hi, is PyCharm-community-edition free software? their licences are unclear.  
Maybe something like VirtualBox or Atom (text-editor).

https://en.wikipedia.org/wiki/PyCharm#cite_note-9
"PyCharm Community Edition is distributed under Apache 2 license, with full  
source code available on GitHub."

https://github.com/JetBrains/intellij-community/tree/master/python