The IPv6 PoPs are generously provided by:
SixXS - IPv6 Deployment & Tunnel Broker
SixXS (Six Access) is a free, non-profit, non-cost service for Local Internet Registries (LIR's) and endusers. The main target is to create a common portal to help company engineers find their way with IPv6 networks deploying IPv6 to their customers in a rapid and controllable fashion. To reach these targets we are providing a whitelabel IPv6 Tunnel Broker and Ghost Route Hunter, an IPv6 route monitoring tool and various other services to help out where needed.
SixXS offers the RIPE, ARIN, APNIC, LacNIC and AfriNIC communities pre-production deployment expertise based on the experience gathered while running the IPng IPv6 tunnel broker since 1999 combined with its successor, SixXS, totaling in more than 17 years of massive experience.
Most of the PoPs are publicly available and provide free IPv6 connectivity to endusers allowing them to enjoy quality IPv6 connectivity. 10 Easy Steps to IPv6 describes how to quickly get going with IPv6.
Full public statistics for this project are available from the Misc/Tools page.