apwal software package provides icon-based floating application launcher with transparency, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install apwal
apwal is installed in your system.
Make ensure the apwal package were installed using the commands given below,
$ sudo dpkg-query -l | grep apwal *
You will get with apwal package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | GNOME |
| Package | apwal |
| Version | 0.4.5-1build1 |
| Description | icon-based floating application launcher with transparency |
| Sub Section | GNOME |