I’ve built a mac app that has all the dev tools I use on daily basis. Its 100% local & 100% offline. I was worried pasting company specific data on public website tools like JSON formatter, SQL Formatter etc and also hate having too many single trick pony apps.

So one app to rule them all. Current list of tools in the app are: - Todo list integrated with Pomodoro timer - Notes with ability to be converted to todo list - Pomodoro timer - JSON/SQL/XML/YAML/Protobuf formatter and error detector. - Converter from JSON to CSV and other formats. - Meditation/Gratitude general - Universal time clocks - Count down timer, focus timer, stopwatch

In development: - Unix time formatter - CloudWatch metrics reader (to monitor my other cloud apps) - S3 explorer (My own infinite cloud storage with no one reading meta-data or scanning my pictures/documents) - Cron explorer and scheduler

In process of putting it on app store. If anyone is interested in trying, DM me.

I've been using Boop, it's pretty good for, json, yaml, datetimes, hashing etc! Missing a lot of what you've mentioned, but might be able to get some more ideas from it!

https://github.com/IvanMathy/Boop