Filter - Tags
This module allows filtering content (articles) on tags. Works on the category, featured and archive views.
include / exclude tags from the filter
include / exclude from indexing by search engines
user/search engine friendly URL possible, replacing ?filter_tag=id with /filter-tag/id or /filter-tag/alias.
Idea based on modtagsfilter by Rene Kreijveld Webdevelopment
Should work with PostgreSQ...