EPiServer sites worth to knowing about.
EPiServers own sites
Developing site Support ToolsEPiServer License RegistrySDKepicode - Open source code modules
Other good EPiServer developer sites
English
Fredrik Haglund's blog - A nice EPiServer developing blog.
for EPiServer CMS.
Epinova A Norwegian blog that the content is written in Norwegian but the post are written in English.
Joel Abrahamsson's blog - A blog about development with EPiServer and .NET.
Search on EPiServer sites by Fredrik Vig - A great EPiServer information blog with a EPiServer customized search engine.
Swedish
blogg.dileno.com - A really well written easy to read blog.
Non developer EPiServer sites
Swedish
MKSE.com - General information what’s going on with EPiServer CMS.