policy and now also accepts articles under the GNU Free Documentation License and the Creative Commons Attribution-Noncommercial-ShareAlike 3.0 license, in addition to the earlier system in which the author gives a non-exclusive license directly to Scholarpedia. Software Scholarpedia uses the same wiki engine as Wikipedia, MediaWiki, with modifications to support voting on revisions. The software's development is done privately. See also Nupedia – which had similar design to Scholarpedia Citizendium List of online encyclopedias References External links Mathematics websites MediaWiki websites Wiki communities Internet properties established in 2006 American online encyclopedias