Most openings apart from 1. d4 d5 and 1. e4 e5 (and 1. c4 c5, etc.) are imbalanced in some way, but some are more than others. The Sicilian defense to e4 and the various Indian defenses to d4 are popular imbalanced openings. For more reading and examples of different opengings, take a look at this article: http://en.wikipedia.org/wiki/Chess_opening#Classification_of_chess_openings
inbalances in the game

yes, most of Black's possible responses to a) 1.e4, b) 1.d4 are imbalanced in the sense of not being strictly symmetrical. But more often than not, imbalance in chess refers to the positional situation, eg White have both bishops but are straddled with double isolated pawns in the centre and an uncastled king, whereas Black have a safe king, better pawn structure but no two bishops and a weakness in the dark squares on the kingside, for instance. Understanding the nature of this type of imbalance is, I feel, the key to finding the right move in many middlegame and even opening positions. In fact, there are openings, eg. the Icelandic Gambit, the King's Gambit, Sicilian (Najdorf), Pirc Defence (My favourite:)), Grunfeld, etc, that seem engineered to create sharp imbalances in the positions that typically result from them
Can someone name some imbalance openings. Like the sicllian to e4. Things like that. They can be for white or black d4 or e4 or anything else you want to add in. Thanks in advance