4 Search engines for Trains enquiry

 
http://irctc.co.in/ is the most known and used Railway enquiry Search engine and as well as the only site with which Railway tickets can be booked online.
I. IRCTC RAIL SEARCH

http://irctc.co.in/

There are other 3 SITES for SEARCHING the trains and the availability, these sites come to handy and OPEN QUICKLY FOR SEARCHING THE AVAILABILITY AND FARES when the server of http://irctc.co.in/  is very busy and unable to open.
II. REDIFF RAILWAY SEARCH

http://indian-railways.rediff.com/

III. CLEARTRIP RAILWAY and FLIGHT SEARCH

http://www.cleartrip.com/trains/

IV. 90DI RAILWAY AND FLIGHT SEARCH

http://www.90di.com/travel/