The Federal courts (in the process of migrating from Solaris x86 to RHE for most applications) run the national "Case Management/Electronic Case Filing" (CM/ECF) system on perl/apache/tomcat. Over 2000 separate perl scripts weighing in at about 1.6 million lines of code.

Developed on the national level by a centralized programming staff (lots of consultants), its delievered to nearly every one of the courts across the country (bankruptcy and district) as a package which we admins can then fix/modify to our heart's (and version controled ;-) content.