How to use/accept altcoins on a website?

Apart from the wallet applications of the coins themselves I have been searching around for ways to actually use altcoins (non-eth based), and have been surprised by how little I have found.

Would be great if anyone could share ways to actually use them on website.

For starters wanted to add the ability to accept payment for services or goods via a shopping cart on my website, but unless use a 3rd party payment processor with very limited coin support or build the system yourself from scratch there is basically nothing out there that I found apart from BTCPay which itself has limited coin support.

After that I was basically looking for any project I could deploy on a web site that used coins. Came across a couple of gambling programs but either old/not maintained or didn't deploy easily/lacked documentation.

Call me picky but while tried to run them, its not the kind of service I would have promoted anyway, I just wanted to see something using an altcoin.

While I might be able to put together something to accept coins my programming skills are not the greatest, the system would probably have security issues and I would be ashamed to release the code publicly.

If there is stuff out there please let me know, I would love to be blasted with 'Your search skills are terrible, there is all this stuff like xyz', it would be great to hear ways to actually use altcoins!