Trademarker  Suggested by sydney71 
Serpentine Sans  Suggested by frd 
Enter Sansman  Suggested by ivansiqueira 
The Voice  Suggested by PePendejo émd 
Entsans  Suggested by Hendrix. 

does anyone knows what font is?

No exact match so far, but check this out for a similar flavor : http://www.myfonts.com/WhatTheFont/forum/case/463696/

the closest is trademarker. http://www.myfonts.com/fonts/fontfont/ff-trademarker/

We got a 'Green' for Trademarker here:
http://www.dafont.com/forum/read/68630/the-voice-of-holland-font