Campaign List Builder is currently available in a Beta version, meaning that it hasn't been fully tested. We recommend you use with caution and test in your Sandbox before installing in Production. - See more at: https://powerofus.force.com/kA080000000HAMz?srPos=0&srKp=ka0&lang=en_US#sthash.LyuYKxeb.dpuf
The Campaign List Builder is a feature of the Campaign Toolkit.
Campaign Tools is an open-source, BSD-licensed package. Developer contributions and involvement are welcomed and encouraged! Salesforce.org hosts all packages and source code on GitHub using git. You can find all code as well as tags, issues lists, and release notes in the code repository. You can find contributor instructions on the Salesforce.org GitHub wiki.
You must be connected to a Salesforce organization to run the installer.
NOTE: Your login information only remains cached during the installation.