Amebis d.o.o. - Definitely THE company for Slovenian language related software (dictionaries, spelling and grammar checkers, etc.). (In Slovenian.)
Dopisovalnica - A threaded discussion on Slovenian language teaching. (Slovenian only.)
English/Slovene dictionary of computer science - Translates words from English, concentrating on computer science terms.
Jezikovna skrpucala - Ratings of Slovenian language used on Web sites. Deals with the most crucial mistakes and provides solutions to them. Not updated any more, yet a good archive. (Slovenian only.)
Slavisticna revija - Journal for Linguistics and Literary Sciences. Issued by Slavisticno drustvo Slovenije.
Slovene for Travelers - An on-line course of Slovene with sound samples.
Slovenian On-Line - A set of on-line Slovenian courses.
The Slovenian Linguist - A repository for anything related to the study of Slovenian dialects.
Thezaurus: Slovenian Language and Cultural Resources - A project of the Institute for Slovenian Studies of Victoria, it includes on-line course of Slovenian language, a compendium of web links, archives on Slovenian language and culture, and discussion forums.