These apps are available for sale in the iOS or Mac App Store.
SwiftoDo is my todo.txt app for iOS. It is written in Swift and is based on UIKit.
SwiftoDo Desktop is my todo.txt app for macOS. It is written in Swift and is based on AppKit.
Simple Call Blocker is my call blocking app for iOS. It is written in Swift and is based on UIKit.
TodoTxt.Library is a .NET library for todo.txt task, task list, and file manipulation. It is open source and is available via NuGet.
This project is something I did recently, but is expected to be static.
I wrote a script for Scriptable, a Javascript-based iOS app for automation, to publish blog posts from any iOS text editor to Micro.blog or any other micropub endpoint.
These projects are, essentially, abandoned at this point.
TodoTxtMac was my first Mac app. It is a todo.txt app, written in Objective C and based on AppKit. It was featured on LifeHacker and linked to from the todo.txt homepage.
I contributed a lot of updates to todotxt.net, a .NET todo.txt client for Windows that was created and coded by Ben R. Hughes. Working on this app got me back into programming outside of work.
I used to be really into running FreeBSD. I got a music tagging and album art-fetching server called Bliss working on it by writing an init script and a wiki containing installation instructions.