Please have a look at this post: http://defenceforumindia.com/forum/economy-infrastructure/31670-how-can-we-improve-indian-railways.html#post420897
The entire thread is also useful.
Vehicles that I could spot:
TATA (India)
Ashok Leyland - Iveco (India and Italy)
Maruti - Gypsy (India and Japan)
ZIL (USSR)
BEML - Tatra (India and Czech Republic)
Almaz-Antey 9K33 (USSR)
KrAZ (USSR)