There are so many alternatives to adsense. If you want to make money from websites you can monetize your websites with CPC ( cost per click), CPA ( cost per action / Sale), CPM ( Cost Per Mile / Impression), Text Link Ads, In-Text, In-Image, In-Video, Pop Up ads, Exit Link Ad Networks. Don't just depend on google adsense. Apply for ad networks which suits for your niche website.
Here you can find the list of ad networks and reviews. <snip>