TPG LR Backup-quickly backs up all of your presets.

TPG Elemental-adds extra Edit in Photoshop Elements options, such as Merge to Panorama and Merge to HDR.

Photographers Toolbox – plug-ins by Matt Dawson include:

Any Shortcut – allows you to change the shortcuts for Lightroom in 16 languages.

Any Tag-helping you to work more efficiently with keywords and synonyms, including those containing spaces.

Any Filter-provides search capabilities similar to Smart Collections but with many more searchable photo fields (criteria) and many more operators for comparing fields.

Any File-import any type of file into a Lightroom catalog and manage the files just like photos.

ListView-shows your catalog as a list of metadata instead of thumbnails.

CaptureTimeToEXIF-adds an Exiftool interface, allowing you to assign capture dates to scanned photos.

Syncomatic-allows you to sync metadata between files with matching names but different extensions, and also between VC’s and their Masters.Search Replace Transfer-designed for bulk changes to text in Metadata Panel fields, which can even be used for complex renaming.Open Directly-opens an original file directly into other software.Photographers Toolbox – plug-ins by Johns Beardsworth include: PhotoSafe-prevents you from accidentally removing selected photos from your catalog.Geocoding Support-expands on the geocoding tools offered by the Map module.Focal-length Sort & Megapixel Sort-adds additional options to the Metadata Filter bar.Metadata Wrangler-choose which metadata to strip or include.Metadata Presets-allows you to arrange the Metadata panel in the order that suits you best.Zenfolio, SmugMug, Flickr, Picasa Web, Facebook and Twitter uploads.Adobe’s official showcase includes links to many lesser known plug-ins developers.

Lightroom plug in