where are all the IPv6 tools?

Hi, I depend on a number of shell tools for manipulating IPv4 addresses, CIDR blocks, etc. like: aggis ipsort.pl grepcidr aggregate I have not yet found much in terms of similar shell utilities for IPv6. I've spoken to authors of some of these tools and they admit they have not yet produced IPv6-capable versions. (Not trying to name and shame: those tools are great, I just want more!) Do folks here know of IPv6 tools that might provide some of the functions the above tools provide for IPv4? Thanks! Jay B.