Updated: July 13, 2020 (March 31, 2003)
Charts & IllustrationsSource Code Licensing Comparisons
| View Source Code | Modify Source Code | Redistribute Modified Source Code | |
| GNU Public License (GPL) | Yes | Yes | Yes, as long as modified code is also licensed under the GPL and source code and applicable copyrights are also redistributed. |
| BSD License (before 1999) | Yes | Yes | Yes, if all advertising of products that use the software mentions that it contains software developed at the University of California, Berkeley. |
| Apache Software License v. 1.1 | Yes | Yes | Yes, but user documentation must acknowledge the Apache Software Foundation and modified code cannot use the Apache name without permission. |
| IBM Public License Version 1.0 | Yes | Yes | Yes, but subsequent contributors can be subject to patent restrictions on any included patented code. |
| Microsoft Enterprise Source Licensing Program | Yes | No | No |
| Microsoft code not covered by Shared Source licenses | No | No | No |
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