Immich. Just found out about it, still gotta try, but looks good, an app that allows you to configure a Google Photos like app locally hosted, with automatic phone backups

KDEConnect - I use it on Windows and android phone. Very nice when you get security codes or links on phone, want to send files or when I want to control audio|video and I watch from the couch.

in general: Fdroid nearly always has a more feature rich and performant alternative

TrailSense, an easy to use, comprehensive wilderness tool.

The goals of the developer are fun to consider:

Goals

• Trail Sense must not use the Internet in any way, as I want the entire app usable when there is no Internet connection

• Features must provide some benefits to people using the app while hiking, in a survival situation, etc.

• Features should make use of the sensors on a phone rather than relying on stored information such as guides

• Features must be based on peer-reviewed science or be verified against real world data

Likewise, the features being developed under those goals are great for getting outside:

Features

• Designed for hiking, backpacking, camping, and geocaching
• Place beacons and navigate to them
• Follow paths
• Retrace your steps with backtrack
• Use a photo as a map
• Plan what to pack
• Be alerted before the sun sets
• Predict the weather
• Use your phone for astronomy
• And more

KepassXC for PC and KeepassDX for Android phones.

I personally would recommend it over Bitwarden since with Bitwarden you NEED internet to access your passwords, and even if is open source, i canmot trust it, security breaches can happen in any time, having your vault locally stored helps a lot.

There are more but i can’t Remember them right now.