I am currently working on my RPG game (Pokemon like) so any of you guys can recommend me best software that can help me to make sprites(pixel art) of the creatures that I want to be in the game .. Thanks..
Paint.net also works. It's free and is often touted as a program on the level of complexity between MS Paint and Photoshop. It's a bit simpler than GIMP but has Photoshop features like layers.
I prefer GraphicsGale and Photoshop for pixel art. GraphicsGale has a free and paid version. The paid version is worth due to the nice animation tools but the interface feels a little weird overall. It's a really good program but there might be better stuff out there for free. Not everyone has access to Photoshop. Krita is supposed to be an amazing open source alternative though I haven't fully played with it.
I like Cosmigo´s Pro Motion (http://www.cosmigo.com/promotion/index.php), with which you also can animate, create tile maps etc. It´s not free though (but well worth the money in my opinion).