"Freenet6's TSP is a new initiative launched by Viagénie, a private company in Canada involved in IPv6 since 1996, to facilitate a faster deployment of an Internet IPv6. Internet is world-wide deployed over IPv4, therefore this project has the main goal of deploying IPv6 at a larger scale by using configured tunnels. Configured tunnel is a transitional method standardized by the IETF to use IPv6 in coexistence with IPv4 by encapsulating IPv6 packets over IPv4. Any host already connected to Internet with IPv4 and having an IPv6 stack could establish link to Internet IPv6."
If our ISP doesn't provide us with IPv6, we have to use a "third party provider", like Freenet6 that allow to create configured tunnels to use IPv6 over IPv4.