I would like to have some advice from my linux programmer friends, on a gui toolkit that I should learn.

I would like to learn a gui toolkit where I can write a program for a gui application that can work both in linux and windows. I mean platform independent gui toolkit. It should be simple and easy to learn.

So that with little effort I can do gui programming for both the OS.

Another point is, that library should be less memory hungry. I mean lite one.

Srinivas

Qt or GTK. WxWidgets for a "true" cross-platform toolkit though I've never used it.

GTK is slighly less user friendly (in my opinion) but is "lighter" than Qt. It is also a good choice for programming in pure C.

Qt is highly object-oriented and a natural choice for C++ programmers.

Qt is platform independent and so is GTK. All three are available as bindings for a number of scripting languages like Python, Ruby, Perl etc.

For Python there is a very light toolkit based on Tcl/Tk called Tkinter which works on both Windows and Linux and is installed by default on Windows along with Python.

FLTK is designed with this in mind.