PerInstallBucks.com - is new generation pay per install affiliate program. You would promote high quality free software and get paid for each install. They pay up to $1.1 per one free installation and you get paid for over 120 countries! This is probably the highest rate in the pay per install affiliate programs business!
This PPI program is suitable for Download traffic.
They offer a promo tools like banners or direct download links. You get paid via paypal, payza, webmoney, paxum once you reach minimum amount of $50. Their software products are 100% clean and safe for your users, no malware/spyware installed.