"This site makes available the complete up-to-date onomastic data for the population of ancient Athens, through a search facility, and through html files that present the latest version of the Onomasticon."
"Allows access to the collection of squeezes, photographs and bibliographical references maintained by the CIL research centre, sorted by inscription-number." In addition, digitizations of the volumes published before 1940 can be viewed at Arachne, the object database of the Deutsches Archäologisches Institut.
Early Christian inscriptions from Asia Minor and Greece. Provides the original text and a translation of the inscription, including commentary and bibliographic references. Images and/or facsimiles are provided when available.
Database of published Greek inscriptions, providing the complete Greek text and critical apparatus of new inscriptions as well as summaries of new readings, interpretations, and studies of those previously known. See here for a concordance of IG inscriptions with SEG entries.
Database of metadata and, when available, links to images of "texts from the ancient world, particularly late period Egypt and the Nile valley (roughly BC 800 and 800 AD).” Important subsets can be searched at the following links:
Database currently includes Greek and Latin inscriptions from "several regions from the Roman province Galatia" (with those of Laodiceia being added). Inscriptions are accompanied with detailed commentary in German.