A Tcl extension for geographic or organisational lookup of IP addresses and hostnames, by implementing bindings to the GeoIP C API. You can use this extension to query Maxmind GeoIP databases.
Inferior-minded people misuse such tools to determine which language to serve the users. That idea will NEVER work, because you can NEVER be sure what language a user understands based on IP. Should never have been let out in the open.