Browse by Categorie
Just browse the directory. You can select a category on the left and walk through all Plugins.
Plugins by Author
Find all the Plugins of an Author. The name of the author is a link to all the plugins of that person.
Suggestions based on Keywords
Select the details of a plugin bu following the read more link. At the left you see related Plugins based on the same keywords as the selected Plugin
Search Plugins, using the search function on the topmenu. You can search for words, all words or exact phrase. Press the extended search button to narrow your search to a specific category. Search uses the Plugin text and keywords.