Being an application software developer, I made the transition to building web applications.  Here are some of them.

Website Description Technology
GitUML UML visualisation for Git repositories Python, Django, Javascript
Python to RPN Python to RPN converter Python, Flask, Javascript
RPN Calculators Online RPN calculators programmable in Javascript Javascript, HTML, CSS
Toolback - App Builder An online programming environment, with low code features. Python, Javascript
Chord Jammer A midi web app that lets you play chords with 1 finger in the left hand and jam safely in the right hand. Javascript, Vuejs
Rationale An argument mapping application C#, .NET

Last modified January 2, 2023: made separate pages for web apps (1ce4952)