Frutti di mare ;-) (Tools for Squid)

Calamaris
parses the Squid V1.1.x, V1.2.x and V2.0.x Native Log Format and generates a report.
shrimp.pl
filters the Squid Native Log Format (V1.0.x AND V1.1.x) into Common Log Format.
scacot.pl (Squid CAche COnversion Tool)
converts different Cacheconfigurations and the associated data in another. IMHO not recommended to use, because its slow and not well tested. (README)