When comparing GNOME Do vs Launchy, the Slant community recommends Launchy for most people. In the question“What are the best app launchers for UNIX-like systems?” Launchy is ranked 11th while GNOME Do is ranked 19th. The most important reason people chose Launchy is:
For those using Debian based distros Launchy is very easy to install as their website has 32 and 64bit .deb files available. For all other diistros Launchy will have to be compiled from source.
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Pros
Pro Plenty of plugins
By using the many available plugins Gnome Do can become a powerhouse of combined tools in one easily launchable and usable application.
Pro Themeable
Users can easily customize the looks of Gnome DO with the available themes in the settings of the app..
Pro .deb files available for Debian based distros
For those using Debian based distros Launchy is very easy to install as their website has 32 and 64bit .deb files available. For all other diistros Launchy will have to be compiled from source.
Pro Easily themed with many available on the web
Launchy can be easily themedby placing themes into the Launchy theme folder and then selecting that theme from within the apps settings. There are also many user created themes available which is great for those that want their launcher to match the rest of their OS's theme.
Cons
Con Has not been updated in a while
With the last update being dated Jan. 2014 development seems to be at a standstill.
Con Small selection of plugins
The official plugin page on Launchy's homepage hosts just 11 plugins.
Con Abandoned
Launchy was last updated in 2010.