There are many websites where you can find lot of ideas. You can choose from them. Choose ideas you feel some vibe for i.e. You need to have some kind of love for the problem to have the energy and motivation to keep working on it. Sharing few website links I am aware of: 1. https://microsaashq.com/ 2. https://join.trends.vc/. Source: 6 months ago

Trends.vc breaks down recent trends well, and is based on data: Https://join.trends.vc/. Source: about 1 year ago

I really suggest you do this yourself. - Subscribe to [Startup Ideas on Kernal](https://www.indiehackers.com/series/startup-ideas-on-kernal?utm\_source=indie-hackers-emails&utm\_campaign=ih-newsletter&utm\_medium=email) newsletter. They market themselves as "Startup ideas anyone can build, buy or invest in". - Subscribe to [Trends VC](https://join.trends.vc/), which sends you a weekly report with some great... Source: over 1 year ago

Trends.vc - Discover new markets and ideas. - Source: dev.to / over 1 year ago

You have a competition, get inspired: https://join.trends.vc/. Source: almost 2 years ago

It looks like your calculator is running KnightOS, a custom operating system for TI z80 calculators. If you no longer want to use it, you can reinstall TI-OS. I suggest looking at the KnightOS website for further instructions: https://knightos.org/. Source: about 1 year ago

The creator also made https://knightos.org, written in z80 asm. Source: almost 2 years ago

Well, whilst it can't quite play Skyrim, because the TI is built around a z80, you can have a full operating system is you'd like. Source: over 2 years ago

There are a very few calculators that you can do this to. See https://knightos.org. Source: over 2 years ago

There is Knight os which might be what you're looking for. It does have lackluster support for math functions but is great for homebrew games. They have detailed install instructions and allow you to revert back to the official os if needed. https://knightos.org/. Source: over 2 years ago