Aftter doning some R&D I found some flowchart and open source graphics softwares.
I installed on my Fedora9. Gimp is like photoshop but I do not find that as good as Photoshop.
Features: An Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw,
or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.
[root@localhost purab]# yum install inkscape
Site Url: http://www.inkscape.org/index.php
Features:Dia is a program for creating diagrams of all kinds. It can create many types of diagrams, including UML, network and flowchart diagrams. The engine is very flexible and dynamically loads diagram-types from disk. Dia can also print diagrams and export tham to a number pf formats including EPS, SVG, and PNG
[root@localhost purab]# yum install dia