While the term Floss makes one think of the candy floss or dental floss, floss is also a computer nerd term. It stands for Free and Open Sorced Softwhere- F/OSS witch is said Floss. the term Floss includes free software and open sorced software. it is lisenced to grant right of users to study, improve and change it though its source code.
some examples are open office, GIMP, Inkscape, Wordpress and Scribus