SmartCache is a js and css gzip & cache script.
It mantains an updated cache of every js and css file on your site and serves it to browsers supporting http compression.
SmartCache generates Expire Headers too!
SmartCache is a stripped down and polished revision of JSmart, from Ali Farhadi. Kudos to him for developing this script at first.
Why use SmartCache versus mod_gzip?First and foremost: not every server supports mod_gzip. If that is the case, SmartCache is for you.
Even if you use have access to mod_gzip, if you cannot configure his caching funcionality or think they are too limited, you could find SmartCache a useful little tool. Or at least, I hope so ;).