Wikis have a well-earned place among the ranks of content management systems (CMSes) as the de facto solution for crowdsourced, document-centric sites. But they are not one-size-fits-all. The encyclopedic style of MediaWiki is a good fit for Wikipedia, but TikiWiki makes for a better groupware solution thanks to features like access control and office document support. Let's take a look at one of the more unusual offerings among open source wikis: LocalWiki, which is focused on building community-driven, local information sites.
The PostGIS database project made its long-awaited 2.0.0 release in April, marking the culmination of more than two years of development. PostGIS is an industrial-strength geographical database that serves as the storage system for a wide range of geo-data processing systems, from map servers to analysis tools.
Considering Linux's foothold in everything from embedded devices to supercomputers, describing the project's growth as astronomical is no exaggeration. But it is a literal truth, too, as Linux and open source software power scores of professional and amateur astronomy projects. Whether you need to precisely drive a large telescope for scientific purposes or just want to create decent-looking astrophotography, chances are there is a project out there already suited for the task.