[6][7] In 2009, JetBrains released the source code for IntelliJ IDEA under the open-source Apache License 2.0.

[8][9] JetBrains also began distributing a limited version of IntelliJ IDEA consisting of open-source features under the moniker Community Edition.

[11] Other development environments based on IntelliJ's framework include AppCode, CLion, DataGrip, GoLand, PhpStorm, PyCharm, Rider, RubyMine, WebStorm, and MPS.

[18] The Community and Ultimate editions differ in their support for various programming languages as shown in the following table.

There was a free plugin from Atlassian for IntelliJ available to integrate with JIRA,[32] Bamboo, Crucible and FishEye.