Inventory of Slavic, East European, and Eurasian Projects http://www.library.illinois.edu/spx/inventory/projects.html
Pilot project of the Working Group on Digital Projects of the AAASS Bibliography and Documentation Committee, headed by Miranda Remnik. Started in 2003, last update, 2008.
“Vse elektronnye biblioteki Rossii i SNG” (http://haibvestnik.ru/arx/elb.htm)
Lists 360 Russian digital libraries. No search engine.
Russian Digital Collections http://viewshare.org/views/erika.spencer/russian-digital-collections/
Inventory of North American Russian digital collections, compiled by Erika Spencer in 2013.
120 collections. Search by time period.