(Project is discontinued.) Seekafile Server is a Windows Service that indexes DOC, PDF, XLS, PPT, RTF, HTML, TXT, XML, and other file formats on the background. It includes sample desktop search application and a sample ASP.NET search application.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.
