IntelliJ has a licenses folder that you can check out; For instance mine is located under here JetBrains\IntelliJ IDEA 129.111\license
You can see that there is a file called IDEA_OpenSource_license.txt
- GRANT OF LICENSE
Subject to the terms, conditions, and limitations set forth in this
Agreement, including any amendments thereto, Licensor hereby grants to
Licensee a limited, non-exclusive, non-transferable,royalty-free
license to use the Software for a period of 1 (one) year as follows:
(a) Licensee may: (i) install the version of the Software that has
been specified in License Certificate on multiple Clients and
operating systems; (ii) use the Software by Authorized Users solely
for the purpose of development of non-commercial open source projects
that meet the Open Source Definition at
http://www.opensource.org/docs/definition_plain.html, and (iii) make
one back-up copy of the Software solely for archival purposes.
(b) Licensee may not: (i) sell, redistribute (except as set forth in
Paragraph 5 herein), encumber, give, lend, rent, lease, sublicense, or
otherwise transfer the Software, or any portions of the Software, to
anyone without the prior written consent of Licensor; (ii) reverse
engineer, decompile, disassemble, modify, translate, make any attempt
to discover the source code of the Software, or create derivative
works from the Software, or (iii) use the Software for any commercial
purpose.
Which seems to completely go against what the Apache License allows you to do
I wonder if this is a relic of a previous License before it was open sourced?
Edit
Dmitry Jemerov has posted on the following on the Jetbrains blog [source]
IntelliJ IDEA Community Edition is completely free and open-source,
licensed under the Apache 2 license and can be used for any kind of
development. Android Studio has the same licensing terms.
