Self-hosted google photos-like image hosting (and video!). Looks slick, simple enough but featureful enough in a sweet spot to make self-hosted image storage a cinch.

Supports automatic image tagging as well and has an android app on fdroid.

Allows developing raw (and other) formatted photos, mimicks lightroom and carries similar editing capabilities.
Good library management.

Raw file editing software, mimicking lightroom or darktable for editing capabilities with fewer library features.

Google photos alternative on device, only for mobile devices not self-hosted