Hello!
Let me answer your by first mentioning which colleges provide no bond or compulsory rural service for a fixed time:-

• NEIGRIHMS, Shillong
• Central Institutes like AIIMS, JIPMER, PGIMER
• Delhi state college Maulana Azad Medical College, University College of Medical Sciences and Lady Hardinge Medical College
• RIMS and JNIMS of Manipur
• GMC , Chandigarh
• Haryana state colleges

Previously, some states which didn't have the bond system but had later adopted, include the following listed states :-

• Assam
• Bihar

Colleges where bonds are practiced in PG as follow:-

• Chattisgarh-1-2 years bond
• Uttar Pradesh- 2 years/40 lakhs
• Goa- 3years/10lakh (1yr practically done)
• Gujrat- 3years/10lakh _ seat leaving - 5 Lakhs surety.
• Himachal Pradesh- 5years/25lakh (strict for around 2 yr not full 5 years)
• Jharkhand- 1yr/10 lakh (Seat leaving 10L+stipend) (STRICT IMPLEMENTATION)
• Karnataka- 3years/50lakh (No bond for aipg candidates) (STRICT IMPLEMENTATION)
• Kerala- 1yr/50lakh (STRICT IMPLEMENTATION)
• Maharashtra- 1year/50lakh (STRICT IMPLEMENTATION)
• Madhya Pradesh- 1year/10lakh (NOT VERY STRICT)
• Orissa- 2years/30lakh (Seat leaving-10 laks+stipend STRICT IMPLEMENTATION)
• Punjab- 3years/15lakh (Not followed till now or maxm 1 yr)
• Rajasthan- 5years/25lakh
• Tamil Nadu- 2 years- 20L (not strict for Allindia candidate)
• Tripura- 2-5years/25-30lakh- (No stipend No bond + no bond for all India guys)
• Uttarakhand- 2yrs/2.5crore
• West Bengal- 3yrs/30lakh for degree; 2yr/20lakh for diploma

Hope this helps !!