Make Money Online Without Investment.
1) Youtube

YouTube, LLC is an American video-sharingwebsite headquartered in San Bruno, California.
YouTube allows users to upload, view, rate, share, add to favorites, report, comment on videos, and subscribe to other users. It offers a wide variety of user-generated and corporate media videos.
GOOGLE ADSENSE plays important role in earning money.
YouTube earns advertising revenue from Google AdSense, a program which targets ads according to site content and audience.
2) Earn with Affiliate marketing

There are hundreds of online merchants like Amazon, Filipino, eBay, Clickbank, CJ etc. where you can help sign up and promote their products.
In affiliate marketing, you are easily helping customer to buy the right products by creating an easy website and you can earn 4% to 20% commission in return.
3) Google Opinion Reward

These apps provides various surveys which should be complete by user with correct options for completion of a survey it provide money for every survey.
4) Swagbucks

Swagbucks.com is a rewards and loyalty-program operator. It is also same as google opinion reward. You will get surveys and get sb point and converted into various coupons.
5) mcent

Browse, earn points, and recharge for free.
Get rewarded for doing the things you do online you do everyday — read the latest news, check Facebook, shop, or search the internet
Use your points to recharge instantly.