Hi,
Still the applications for REAP 2019 is not released. It will be released by 30th of this month. The last date to submit the application with payment is 29 June 2019.
The documents to be kept ready before filling the form are:

• Scanned copy of the photograph (JPG format)
• Scanned copy of signature (JPG format)
• Category certificate
• JEE main 2019 rank card (if applying through it)
• Scanned copy of 10+2 marks sheet
• Valid mobile number and email id
• Credit/Debit or Net banking details

The details about REAP 2019 is given in the link:
http://engineering.careers360.com/articles/reap
To know about various government colleges of Rajasthan go through the link:
http://engineering.careers360.com/colleges/list-of-government-engineering-colleges-in-rajasthan