Features for using taxonomy tags with Media Library. Also converts NextGEN Gallery images to WordPress Media Library images.
TML - Tags for Media Library - was originally developed for porting NextGEN Gallery 1.9 to WordPress Media Library but has evolved into something that may be useful to anyone trying to use taxonomy tags on WordPress Media Library items. TML supports dynamically generating galleries using a criteria based on taxonomy tags, multiple tag taxonomies for media items, bulk assignment/removal of taxonomy tags to/from media items, filtering the Media Library by taxonomy tags, sorting the media items based on a priority tag, a search widget for media items using a criteria based on taxonomy tags and an alternate high density view of the Media Library. The website for this plugin is here. This version requires WordPress 4.0 and PHP 5.4.
For NextGEN Gallery 1.9 users: This plugin first converts NextGEN Gallery's image database to a WordPress Media Library image database. After the conversion NextGEN Gallery images and galleries have become WordPress Media Library images and galleries. A WordPress taxonomy 'ngg_tag' is created and the NextGEN Gallery image tags are saved in this taxonomy. This plugin implements the NextGEN Gallery shortcodes [nggtags], [nggallery], [slideshow], [album] and [singlepic] by dynamically translating them into an equivalent standard WordPress [gallery] shortcode so post content with these shortcodes will still work without editing the post content. NextGEN Gallery's sortorder is implemented using a tag taxonomy to hold priorities. This plugin works with NextGEN Gallery 1.9.13.