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This module integrates Drupal with the Apache Solr search platform. Solr search can be used as a replacement for core content search and boasts both extra features and better performance. If you're looking for Apache Solr integration, this is possibly the best option available.
Features
Faceted Search
Faceted search is supported if you use the facet API module. Facets will be available for you ranging from content author to taxonomy to arbitrary fields.
More like this
Relevant content blocks ("More like this" blocks) can be added to any node page. The block will show you relevant nodes and/or nodes similar to the one your site-visitor is viewing. The analysis happens realtime in Solr
Search Pages
Multiple search pages with optionally customized search results, layout and others
Search Environments
Add multiple Solr Search cores and query them so you can optimally connect to the one of your choice. Ideal to have multiple facet configurations.
ImageCache_Profiles module allows you to set user profile pictures that are consistent throughout your site and allows avatars on the user profile pages, nodes and comments to be a different size.
Provides user authentication with Shibboleth (both v1.3 and v2.0) as well as some authorisation features (automatic role assignment based on Shibboleth attributes).
The default password hashes in Drupal 6 (and before) are rather insecure. MD5 is easy to crack, should an attacker find a database dump or gain access to your database. This module implements secure password hashes using the phpass password hashing method