If you are looking for an low budget tab then zync z909 plus is the best at an price of Rs. 3000 only.
It has No 3G. It supports Wi-Fi with 1 GHz Processor and has 256 MB RAM, 4 GB inbuilt. The size of tan is 7 inches, 800 x 480 px display which gives awesome quality and feeling if playing games and watching movies. It has 0.3 MP Camera and supports Memory Card, upto 32 GB.
It comes with operating systems of Android, v2.3 which is running very smooth. The main thing about this tab is which lags him back is battery life its not very much supportive.