Rudra isn't really an Indian band. They are from Singapore. I can't even remember when they last toured India.
Anyway, Here are a few link's for starts. I'm going to be shameless and include my band in here too
This band here is called Zygnema. Power Groove type stuff. They are pretty badass live - Zygnema Music, Lyrics, Songs, and Videos
This here is Devoid. Old school thrash, although their newer stuff has gone more modern. Check em out - Devoid Music, Lyrics, Songs, and Videos
Scribe (Post Hardcore) - Scribe > NH7 | Discover new music from India and around the world
This here is Providence (My band) We just call ourselves heavy metal... I don't even know why, really. https://soundcloud.com/providenceindia
Let me know your opinionz!