Whisker Menu is an application menu / launcher for Xfce that features a search function so you can easily find the application you want to launch. The menu supports browsing apps by category, you can add applications to favorites and more. The tool is used as the default Xubuntu application menu starting with the latest 14.04 release and in Linux Mint Xfce starting with version 15 (Olivia).
The Whisker Menu PPA was updated to the latest 1.4.0 version recently and you can use to both upgrade to the latest version obviously, as well as to install the tool in (X)Ubuntu versions for which Whisker Menu isn’t available in the official repositories (supported versions: Ubuntu 14.04, 13.10 and 12.04 and the corresponding Linux Mint versions). For see what is the difference with the previous release, see the changelog in its main website.
Submitted by: Andrew