Most of them are known from the bigger and well known audio players but the main focus during developing (in contrast to many other players) has been performance, low CPU usage and low memory consumption.
One of Sayonara's goals are intuitive and easy usablility never leading to the impression you are using an unnecessary bloated program. Currently it is only available for Linux.
Many supported music and playlist formats
Media library with search function
Last.FM radio and scrobbling
Install Sayonara audio player on ubuntu
You need to download deb packacge from here once you have deb package double click on it to install.