Hello guys~ sorry for keeping you guys too long. today i got a very nice app (and free, of course!). its called Google Sketchup. before this ive never heard about it, before my friends told me about it. you can download it here.
this app allows you to draw almost ANYTHING from architectural design, engineering drawing, interior designing and even product design. it is easy to use and simple too! Right now, i'm designing my dream mansion. Woohoo~
Go and download now! Seriously, it's fun!