Below is a giant of places you find or scrape proxy server IP addresses and ports. This helps keep you anonymous and private on the internet by placing a middle man computer proxy server between you and the internet, essentially making the proxy server your internet bodyguard.
You can test this list of proxy servers to make sure they all still work using the app to check list of websites to see if they are up and working.
One thing to keep in mind with any of the proxy servers you might use from the list above is these are public proxy servers. This means the proxy servers found at the above proxy server list websites is uses by a lot of people so you may end up getting blocked by certain online services (facebook, youtube, etc) more frequently than you might like.
The way around this is to use a more private proxy server which might end up costing a couple of dollars per month. Examples of this type of more elite proxy server includes companies like NordVPN and IPvanish. The way these type or more elite proxy server works is you intall their software to your computer and from within the software interface you can select from dozens of different proxy servers around the world.