Free retrieval software software for windows

VisualPhotoCompare compares photos by visual content (content-based image retrieval) in a directory/drive and subdirectories. VisualPhotoCompare can be used when you have a lot of images and you want to find duplicates, but it is possible that the size (width x height) of the photos is not the same.
First it lays an 8x8 grid on the photo. For 4 cells [3,3], [6,4], [4,6] and [7,7] an average RGB (red, green, blue) is calculated. This information goes to the work file. When comparing the lines in the work file 2 photos are the same if the differences between each R, G, B of the 4 cells are less then the setting of Max RGB difference.

Personal Library Manager is an useful and free book collection organizer.
Main features:
- ISBN lookup with cover retrieval
- Library statistics
- Search through title and author
- Filter records
- Create, backup, open, and compact database
- Settings stored in xml so its portable

Subject Search Server (SSServer) is a strong search application which will automate the retrieval and selection of all the useful information available on your Web Site.
SSServer is fully configurable: you may select a desired query form template, files and directories of your Web server to be scanned while searching, language of your documents, etc.
Along with the traditional Literal Search approach, SSServer also supports the Subject Search method developed by Kryloff Technologies, which provides outstanding search quality! The Subject Search method works in more than 37 languages: we are proud of the work we have done and think that we provide the most comprehensive and easy-to-use language support available.
Main features:
- Search for data based on users questions. The resulting reports contain the most relevant data retrieved directly from your site. Furthermore, users may enter questions in the language of their choice
- Build a map of your site. SSServer formats and displays the map in an easy-to-understand and navigate hierarchy of directories