What are the best Google Adsense alternatives for small blogs?

The best one probably is Kalooey Ads (kalooey.com/ads).

Kalooey Ads is the first and only PPC publisher network to have actual INSTANT PAYOUTS! No longer do you have to wait for your cash withdrawal request to be approved, as with daily payouts. With us, all you have to do is click the “Withdraw” button in your account and the money you made goes straight into your PayPal account!!! Also, the minimum payout amount is $2.00 and the minimum we charge for clicks is $0.05!!!!!!