Complete , simple and powerfull , all option for band control included ! But free for only 3 user . I have not found better 20' min for reading instruction, installing and setup for non expert , (3' min for expert ) !
QuotaGuard - QuotaGuard Static IP's are a unique proxy service allowing applications running on shared cloud services to access IP-restricted APIs and provide IP-based authentication services.
Squid Proxy - Website Content Acceleration and Distribution. Thousands of web-sites around the Internet use Squid to drastically increase their content delivery. Squid can reduce your server load and improve delivery speeds to clients.
proxyRAIN - proxyRAIN provides clients a seamless IP rotation service where we monitor their usage needs and adjusts IPs to create a proxy network.
3proxy - 3proxy freeware proxy server for Windows and Unix. HTTP, SOCKS, FTP, POP3
Gimmie Proxy - Gimmie Proxy is a rotating proxy API.
FreeProxy - Feature summary from website:* Internet connection sharing with demand dialling