What are some of the best price stock alerts tools for desktop devices?

Intrinio has a whole marketplace for financial data feeds here: https://intrinio.com/marketplace... If it's not in their marketplace and you're out of options, I'd take advantage of their JS SDK and build out your own custom dashboard: https://github.com/intrinio/intr...

Simple stock ticker that runs in a browser and let's you track multiple stocks.

Probably the best tool I've used for graphing but also has alerting etc.

Pretty powerful APIs