Free Grotesque Text Fonts
Roboto
by Google Android Design
in Basic / Sans serif
Linux Biolinum
by Philipp H. Poll
in Basic / Sans serif
Above
by Hypefonts
Inprimis
by Savio Bellini
in Basic / Sans serif
Genera
by Sani Sanjaya
in Basic / Sans serif
Altona Sans
by Shaped Fonts
in Basic / Sans serif