From Wiki:SourceForge:

: ''"SourceForge (at http://sourceforge.net) is a service to the free software community, delivered by VA Linux Systems. It is a free OpenSource Linux-driven CVS repository bugbase & hosting site."''

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According to [http://firstmonday.org/issues/issue7_6/krishnamurthy/ "Cave or Community"], most projects on SourceForge seem to have only one developer.