SPyDI Is a powerful engine to create distributed full text indexing systems and distributed search engines. It supports harvesting, crawling (pull mehtods), and push methods (via a Web interface or SPyRO Web services). It supports boolean and vector Information retrieval models. It has few dependencies, and comes with its own HTTP server and HTML embedded pages language (called pyew and wey pages), and session manager. It can use the SMTP of the Python library. It supports replacing the default modules with some better modules (Apache, exim, etc).
Invenio (formerly CDSware) is a suite of applications that provides the framework and tools for building and managing an autonomous digital library server. It complies with the Open Archives Initiative metadata harvesting protocol (OAI-PMH) and uses MARC 21 as its underlying bibliographic standard. Its flexibility and performance make it a comprehensive solution for the management of document repositories of moderate to large size.
openPLM is a Web-based Product Lifecycle Management (PLM) application. It provides a configuration management system that manages all kind of files and data as documents in a product structure. It supports documents, parts, BOMs, part-document links, electronic signatures for objects, revision management, check in and check out for all files, plain text search using the Xapian engine, navigation between objects using Graphviz, and user management that allows sponsorship, delegation, and rights. Plug-ins are available for Thunderbird, OpenOffice/LibreOffice, FreeCAD, and Gedit.