The paper presents the main results of a survey aimed at a comparative analysis of some widely used open source software tools for creating digital repositories with respect to their applicability for web publishing of digitized Bulgarian cultural heritage collections and making them accessible via Europeana. The parallel has been made according to a well-defined set of features like availability of convenient authoring/annotation and browsing tools, image scaling and high resolution support, functionalities of the built-in search engine, recognizable file types, user management, OAI-PMH compliance, etc. The Europeana Data Model and the Europeana Semantic Elements standard are briefly described from the viewpoint of publishing in Europeana. Some practical recommendations and conclusions are given as a final result.