These are AFAIK the most active proxy lists on the web:
Code:
<a href="http://proxb.com">Proxy Sites</a>|<a href="http://www.tech-faq.com/proxy.shtml">Proxy</a>|<a href="http://mwolk.com">Proxy</a>|<a href="http://proxy.org">Proxy.org</a>|<a href="http://allproxysites.com">AllProxySites</a>|<a href="http://www.azproxies.com/" title="A-Z Proxies">A-Z Proxies</a>|<a href="http://www.juvos.com">Proxy Sites</a>|<a href="http://www.centurian.org/">Anonymous Surfing</a>|<a href="http://www.webevader.org" target="_blank">WebEvader.org</a>|<a href="http://www.findproxy.org">FindProxy.Org</a>|<a href="http://unblocked.me/youtube.php" title="Youtube proxy unblock youtube with proxies">YouTube proxy</a>|<a href="http://www.proxywebsites.biz">ProxyWebsites</a>|<a href="http://www.atproxy.net">@Proxy</a>|<a href="http://www.proxyliste.com">ProxyListe</a>|<a href="http://www.mylinktrain.com">Proxy Sites</a>|<a href="http://www.thunderprox.com">Free Proxy</a>|<a href="http://www.xeem.info/">Xeem List</a>|<a href="http://www.proxybuzz.com">proxy</a>|<a href="http://www.proxysites.in">Proxy Sites</a>|<a href="http://www.workingproxies.info">WorkingProxies</a>
Based on Alexa at 15 May 2009:
1) Tech-Faq.Com - 4,826
2) Proxy.Org - 10,078
3) Mwolk.Com - 52,590
4) Centurian.Org - 94,679
5) AZProxies.Com - 130,335
6) ProxyListe.Com - 131,542
7) ProxB.Com - 146,044
8) AtProxy.Net - 154,075
9) Xeem.Info - 166,073
10) WebEvader.Org - 170,388
11) WorkingProxies.Info - 180,522
12) Unblocked.Me - 188,039
13) AllProxySites.Com - 238,599
14) FindProxy.Org - 284,923
15) ProxyWebsites.Biz - 333,528
16) ThunderProx.Com - 386,088
17) Juvos.Com - 417,549
18) ProxySites.In - 425,959
19) MyLinkTrain.Com - 444,167

If you would thank me for this post, than please submit your proxy to my proxy list! Thanks in advance