[Dudi]

Indian businesses* can get a free .in domain name if you register on this site: https://www.zoho.in/

Additional services:

Free webhosting:
100% Ad-free Website
Custom Themes
Custom Domain Hosting
Unlimited Websites Hosting
Unlimited Storage
Unlimited Bandwidth
Unlimited Pages
Unlimited Galleries
Unlimited Slideshows
Blogs

Free E-mail hosting:
5 GB Mail Storage (Per User)
Add up to 25 users
POP & IMAP Access
Anti Virus and Spam Filtering
iOS & Android mobile apps
Integrated Calendar, Notes & Tasks
Dropbox Integration
Global Address Book
User Aliases
Self Migration Tools

*If you live outside from India, then you can register and use free webhosting and email hosting, but you have to pay for domain name.

[Sagnik]

One thing you forgot to mention ...
It has only one year validity.
They manually check every domain name before actually registering it.(they do not allow domains that contain the word hack, crack, null etc.)

[Dudi]

One thing you forgot to mention ...
It has only one year validity.
They manually check every domain name before actually registering it.(they do not allow domains that contain the word hack, crack, null etc.)

Yes, after one year, you will have to renew your domain subscription which costs $8 (approximately 500 INR).