Aliquam is a great alternative font for a high quality Helvetica Font. Unfortunatelly there are available only 2 types, light and bold, but the font quality is perfect so you don't need to worry about that. As you can see in the image below Aliquam Font looks crisp and clean.
Tip: To install this font, extract the files, select all fonts, use the right click and select "Install".
You are free to use this font in commercial and non-commercial purposes. Font created by Álvaro Thomáz.