I was looking at the memory the X server was using and I heard there were many projects to make it significantly smaller, in some cases 700Kb : http://www.pps.jussieu.fr/~jch/software/kdrive.html

but this version does not support hardware 2D or 3D acceleration of R300 or NV25, there is no driver for either of them.

is there an window system without the heavy (in some cases 100 MB) system memory load ?

it was said that the usual X.Org window manager can be made significantly smaller, but I was unable to find information on how to do that.

would you happen to know where I can find information about doing that ?

X.Org claim that DRI will work on r300 and up on version X11R7.0, but they didn't mention if that works with the open source R300 drivers or the proprietary driver.

there is also the DirectFB project : http://www.directfb.org/index.php?pa...s%2FDirectFBGL

and the MiniGLX : http://dri.freedesktop.org/wiki/MiniGLX
and FBDRI : http://dri.freedesktop.org/wiki/FBDRI
as well as something here : http://dri.freedesktop.org/wiki/DriWithoutX

it is very confusing, there are so many projects, which one of them works with full hardware acceleration on R300 and NV25 without heavy memory load ?

Have you tried the new(er) modular xorg? Might do the trick for you.