What (realistic) software tool do you need that doesn't exist

I would love a copy/paste stack utility. The ability to copy multiple selections and then paste them in order. For instance you could press ctrl+c five times in your source and then switch windows to the destination and then presss ctrl+v five times to get everything copied and then pasted in one go. Maybe allow toggling between FIFO and LIFO. I know MS Office has a clipboard utility that keeps a history but as far as I know it doesn't do a stack paste and it doesn't exist outside of the Office suite.

I think you'll find this would save a ton of time in office jobs that require a lot of excel work.

Open Frequent Files (in addition to Open Recent Files). Seems easy enough to me.

GUI file browsing details that influence the width of their column. Too often I find long names truncated and have to adjust the width myself when there's obviously lots of white space in other columns. Maybe a bit too OS for your question.

I've been looking for an open source alternative to VMware vRealize Automation and Cisco Prime Service Catalog. I use Stackstorm and Terraform for the orchestration on the backend. What I need is a front end to put in from them so users can order my services.

I've had a couple of failed attempts at creating one myself. What I keep getting hung up on is that I don't know front end programming. I've tried working on it in the evenings and get frustrated with the front end development.

I've thought about founding a company to work on it and hire some contractors to do the front end work, but I'm not really interested in running a company.

I want universal copy-paste like Apple has between devices. It would be great to have that between my Macbook and my Windows machine that I use for video calls/streaming.

Open-source device management/administration system like JAMF