Clicksor is an alternetive of Adsense. If you prefer not using Adsense or have stopped using Adsense on your website, You may consider Clicksor. Clicksor offers webmasters the opportunity to earn income by simply underlining a selection of clickable text or displaying targeted contentual banner on their websites.
Clicksor's payout is lower ($20 payout, pay via Paypal) as compared to Adsense and they claim that publishers earn 70% of what advertisers pay per click. However due to their smaller advertiser network, the pay per click and click through rate aren't high as Google.
You can make more money than AdSense if you join Clicksor's generous affiliate program too. They pay 10% commission for each advertiser or publisher you refer. The commission is calculated on daily basis, base on the referred advertiser daily spending or the referred publisher's daily earning.