https://stevenhills.ath.cx/inselkampf/uk/ - A range of tools. Including a collo tool, army counter and ocean rank lists.

https://ikforum.labgecko.com/ - The public IK forum.

https://unforgiven-ik-uk.blogspot.com/ - A take on the world of IK from the much respected Unforgiven.

https://skandar-ik.blogspot.com/ - A take on the world of IK from Skandar. I suppose everyone is entitled to their opinion.