The train app for commuters!
Nearly Departed was started in 2015, when the app I was using disappeared from the appstore, and none of the alternatives felt quite right. Originally written in Objective C and UIKit, it was re-written for iOS and watchOS using SwiftUI in 2021.
Alternative Unix man pages
tl;dr pages is an app for displaying information from the tldr-pages project. This is a community-driven set of help pages for Unix commands which are much more concise than the traditional man-pages.
The iOS app is open-source on GitHub.