The Archive supports a collection of apps for Splunk prior to version 4.0. Browse the menu at left to find apps or add-ons by the category of solution they provide or the Splunk function they're built for. To learn more about installing apps in Splunk 3.x, check the Adminstration Manual for your version.
Client apps let you do just that! Make your own toolbars, integrate Splunk with your own app, or even make whole new programs that call Splunk's APIs. Or, you can download clients other people have made.