+A Proxy Finder is a powerful tool which makes it easy to find HTTP, HTTPS and Socks proxies.
Launch the program, click Start, and it will immediately download lists of proxies from various web sources, displaying them in a table.
And with that done, +A Proxy Finder checks everything it's found, confirming that each proxy is working, determining its type, country of origin, and even rating it for anonymity (zero or less is bad, but 40 or more means your IP address remains hidden).
As +A Proxy Finder may initially find thousands of proxies, it's no great surprise that reviewing each one can take a very long time. The program can use up to 500 simultaneous connections for verification, though, so there's plenty of scope for improving performance.
And of course you don't need to run a full verification check every time. After you've done it once, A+ Proxy Finder can save its list for easy reference at some later date (or you can even schedule it to run unattended).