Certainly, there are several alternatives to Google AdSense for monetizing your website or blog. Here’s a list of 20 alternatives, though there are many more options out there:

1. Media.net: Offers contextual ads powered by Yahoo and Bing.
2. AdThrive: Focuses on premium ad management for bloggers and content creators.
3. Amazon Associates: Allows you to earn from Amazon affiliate links and banners.
4. Infolinks: Provides in-text ads, in-fold ads, and other innovative ad formats.
5. PropellerAds: Offers a variety of ad types including pop-unders and native banners.
6. Sovrn (formerly VigLink): Automatically converts your existing links into affiliate links.
7. Revcontent: Known for high-quality native ads and content recommendation widgets.
8. Adversal: Provides banner and pop-under ads with a low minimum payout.
9. Yieldmo: Focuses on enhancing mobile ad experiences with engaging formats.
10. BuySellAds: A marketplace for buying and selling ad space directly.
11. ShareASale: An affiliate marketing network with a wide range of products.
12. Bidvertiser: Offers a mix of CPC, CPA, and CPM ads.
13. Chitika: Offers mobile and local ads in addition to regular contextual ads.
14. AdCash: Provides a wide range of ad formats and global reach.
15. InfoLinks: Specializes in in-text and contextual ads.
16. PopAds: Concentrates on pop-under ads with quick website approval.
17. AdRecover: Focuses on recovering ad-blocked revenue by re-engaging users.
18. Clicksor: Offers various ad formats including inline text ads and interstitial ads.
19. PopCash: Specializes in pop-under ads with a user-friendly interface.
20. Adbuff: Emphasizes premium inventory and high CPM rates.

Please note that the effectiveness and earnings from these alternatives can vary based on factors like your website’s niche, traffic volume, and audience demographics. It’s recommended to thoroughly research each platform, read reviews, and consider testing a few to find the one(s) that work best for your specific situation. Always adhere to the terms and conditions of any advertising program you choose.