Cardapio is a great replacement for the Ubuntu main menu
Here's how it looks: Of the main advantages it is worth noting:

- Integration with Google search allows you to search not only applications, but also results on the Internet.
- The ability to attach the most necessary applications at the top of the list (right click on the menu item - “Pin this item”)
- The ability of the menu applet to be located on any panel (vertical, horizontal) and automatically resize the icon according to the size of the panel
- The ability to easily change the name of the menu and its icon
- Ability to resize the menu as a simple window with saving size
- Support for add-ons (I have not found anything other than those offered in the kit)

Installation
Cardapio has an official PPA: After installation, Cardapio will be available in the list of applets in the Gnome panel. To add: right-click on the panel -> Add to panel ... -> select Cardapio from the list -> Add Based on these two articles.
sudo add-apt-repository ppa:tvst-hotmail/cardapio
sudo apt-get update && sudo apt-get install python-keybinder cardapio