Entropy/IP

https://github.com/akamai/entropy-ip

The Entropy/IP algorithm allows for inspecting and generating IPv6 addresses. Entropy/IP can determine the entropy of different nibbles and the relationship between different components. Based on this analysis, it can also create valid-looking IPv6 addresses.

IPv6 RIPEness

https://ripeness.ripe.net/

RIPE gathers data about the IPv6 deployments worldwide and publishes the information on their IPv6 RIPEness website. The deployments are judged on four points:

• Having an IPv6 address space allocation or assignment from the RIPE NCC
• Visibility in the Routing Information Service (RIS)
• Having a route6 object in the RIPE Database
• Having a reverse DNS delegation set up

zesplot: IPv6 Visualization

https://github.com/zesplot/zesplot

zesplot is an IPv6 visualization tool. It turns a list of IP addresses into a picture, for example as a heatmap representation. It works based on squarified treemaps, since the IPv4 way of space-filling curves works poorly for such a sparse space.