Indo-European Etymological Dictionary (IED)
- Ambitious project based at the Leiden University (The Netherlands). It contains etymological data for some individual Indo-European (IE) languages, as well as for some branches of the family.
- http://www.indoeuropean.nl/

Indo-European: Possible Homeland & Migrations Slideshow
- Introductory page on the homeland problem, ans slideshow of homeland and possible migrations after mainstream opinion.
- http://www.hjholm.de/

The Early History of Indo-European Languages
- Authors: Thomas V. Gamkrelidze and V. V. Ivanov. (Scientific American, March 1990). Article by two well-known linguists, presenting a controversial theory about the origin and development of the IE languages.
- http://www.armenianhighland.com/main.html

The Spread of the Indo-Europeans
- Scholarly article by Frederik Kortlandt on the dating of the spreading of the Indo-Europeans based on information obtained from both linguistic and archaeological research.
- http://www.kortlandt.nl/publications/art111e.pdf

Did Indo-European Languages Spread Before Farming?
- Journal article by Jonathan Adams and Marcel Otte scheduled to be published in "Current Anthropology" that challenges the dominant theory placing Indo-European dispersal in the Bronze Age.
- http://www.esd.ornl.gov/projects/qen/Indo2.html

Indo-European and the Indo-Europeans
- Article by Indo-European scholar Calver Watkins, providing a survey of Indo-European linguistics, and how this field of study sheds light on the homeland of the first speakers of Indo-European. [From The American Heritage Dictionary of the English Languag
- http://www.bartleby.com/61/8.html

Indo-European Roots Index
- Comprehensive listing of the approx. 600 Indo-European roots that have derivatives in English, with links to the corresponding entries in the online edition of the "American Heritage Dictionary of the English Language: Fourth Edition" (2000).
- http://www.bartleby.com/61/IEroots.html

Kurgan Culture
- Detailed description of the archaeological findings associated with the "Kurgan culture", a 5th-3th millennium BC civilization north of the Black Sea, whose inhabitants are widely thought to have been the speakers of Proto-Indo-European (PIE). I
- http://www.iras.ucalgary.ca/~volk/sylvia/Kurgans.htm

Proto-Indo-European Language Demonstration and Exploration Website
- Basic overview of the Indo-European language family, with particular attention to its major members. From the College of Liberal and Fine Arts (COLFA) at the University of Texas at San Antonio.
- http://colfa.utsa.edu/drinka/pie/

Proto-Indo-European (PIE)
- A good, if rather brief, overview of the Proto-Indo-European language, with outlines of some of its daughter branches. The author is Marisa Lohr, a Research Fellow at Trinity College, University of Cambridge (England).
- http://www.chiark.greenend.org.uk/~marisal/ie/pie.html

The Ergativic Stage of Early Proto-Indoeuropean
- Web version of a doctoral thesis by Hans-Joachim Alscher concerning the origin of the Indo-European nominal declension and gender systems. Includes a discussion of the possible relationship between the Indo-European and Afro-Asiatic language families.
- http://www.dabis.at/Anwender.htm/Alscher/contents.htm

Linguistics: Historical Linguistics
- A light-hearted discussion of Indo-European and other linguistics topics, from the staff in the Linguistics Program at Bucknell University (Lewisburg, PA, USA).
- http://www.facstaff.bucknell.edu/rbeard/hippo.html