Wikipedia
Skotos
Skotos, sometimes known as Skotos Tech, is an online game company that was founded in 1999 and released its first game, Castle Marrach, in September 2000. Its primary focus is prose online RPGs (essentially, MUDs and MUSHes), though it currently offers a total of 15 different games. These include a number of graphical RPGs and online strategy games, which are also available at other sites.
Skotos is a commercial service that charges a monthly fee for its services. It is also the owner of RPGnet, a free tabletop role-playing web site.