Pour le graphisme tu peux utiliser dia
ash@seal:~$ sudo apt-cache show dia
Package: dia
Priority: optional
Section: graphics
Installed-Size: 488
Maintainer: Debian Dia Team <pkg-dia-team@lists.alioth.debian.org>
Architecture: i386
Version: 0.94.0-17.1
Depends: libart-2.0-2 (>= 2.3.16), libatk1.0-0 (>= 1.9.0), libc6 (>= 2.3.5-1), libcairo2 (>= 1.0.2-2), libfontconfig1 (>= 2.3.0), libfreetype6 (>= 2.1.5-1), libglib2.0-0 (>= 2.8.5), libgtk2.0-0 (>= 2.8.0), libpango1.0-0 (>= 1.10.2), libpng12-0 (>= 1.2.8rel), libpopt0 (>= 1.7), libx11-6, libxcursor1 (>> 1.1.2), libxext6, libxi6, libxinerama1, libxml2 (>= 2.6.23), libxrandr2, libxrender1 (>= 1:0.9.0.2), zlib1g (>= 1:1.2.1), dia-common (= 0.94.0-17.1), dia-libs (= 0.94.0-17.1)
Recommends: gsfonts-x11
Filename: pool/main/d/dia/dia_0.94.0-17.1_i386.deb
Size: 183826
MD5sum: 9724211a56f925eb68a0e342cbdcb2e8
Description: Diagram editor
Dia is an editor for diagrams, graphs, charts etc. There is support for UML
static structure diagrams (class diagrams), Entity-Relationship diagrams,
network diagrams and much more. Diagrams can be exported to postscript and
many other formats.
Tag: interface::x11, role::sw:application, uitoolkit::gtk, use::editing, works-with::image:vector, x11::application