From README:

Aclgen is a tool to create minimal length ip access lists
and aggregated routing tables primarily for Cisco routers.

Aclgen is fast. It takes only 15 seconds to create a 17000 line
long access list for some 44000 entries of my routing table.

Aclgen is flexible. It accepts various input formats and
you can specify any output format by a printf like format-string.

Aclgen is intended to use in large scripts creating router
configuration from different databases.

Any contribution is welcome. Send me your script using aclgen.
I'll bundle it with the program.

Gabor Kiss <kissg@sztaki.hu>

WWW: http://gatling.ikk.sztaki.hu/~kissg/pd/