List of Tor exit nodes is publicly available. You only want "exit nodes" and it's available as CSV. This should be 100% complete and accurate as it's generated directly from Tor directory.
A free list of open proxies is available from iblocklist.com. A free list that incorporates open proxies, Tor nodes and VPN endpoints from ip2location.com.
The last two have most likely limited coverage and accuracy, especially as it comes to VPN exit nodes - there's just too many of them. Some providers take another approach and consider all "hosted subnets" (subnets from which ISPs assign their clients IPs for hosted servers) as some kind of VPN or proxy, as end-users should be connecting from "consumer" subnets.
