Starting out as IBM PC Server, rebranded Netfinity, then xSeries and now System x, these servers are distinguished by being based on off-the-shelf x86CPUs; IBM positions them as their "low end" or "entry" offering.
Note: Previously IBM servers based on AMDOpteron CPUs did not share the xSeries brand, neither did x86 based BladeCenter products. Instead they fell directly under the eServer or as of 2005 the "IBM Systems" umbrella.
Egosoft: X - Official site. Contains development news, X-Tensions tour, covering quests, ships, combat, and strategy, screen shots, forum, chat room, and downloads of patches and demonstration versions.
Meta Description: [ egosoft: Computer Games / Computerspiele! ]
The Commander's Space Station - Contains screen shots, tips on planetary landing and ship command, maps, X-Tension database including ranks, equipment, ships, and factories, and SAS guild information.
X Story Archive - Offers fan fiction, including Traders Tale and Rogue Series.
X-Universe Community Webring - Lists fan sites.
Meta Description: [ The webring for egosoft's space game X-Beyond the Frontier. ]