Just released v2023.4.0 of #Photini, a simple #photography #metadata (#Exif, #IPTC, #XMP) editor.
https://photini.readthedocs.io/en/latest/

This version adds "image regions", allowing the user to label parts of a picture. See https://www.iptc.org/std/photometadata/documentation/userguide/#_image_regions for more about image regions.

PS Photini also includes a #Pixelfed / #Mastodon uploader that reuses the metadata that's already been set for each picture.

One thing missing from my #Pixelfed uploader (for my #Photini metadata editing program) is a way to set the location. Photini allows users to set latitude+longitude for each photo (by dragging it on to a map) but there's no obvious way to convert that to a Pixelfed location. (Pixelfed uses a data base of towns with >5000 inhabitants.)

I currently use #OpenCage to convert latitude+longitude to an IPTC location (a hierarchical address). They can also do various location ids, but not Pixelfed's.