TikZ can draw flow chart but I want some sort of a graphical tool where I can create flowchart in an interactive way and then somehow export to LaTeX. Any advice? I am not a geek and the interface should not be too intimidating. An on-line tool or an off-line package will be fine, but it should run on Linux.
Dia is an open source program for drawing vector graphics. I find it quite handy for drawing diagrams and schematic drawings. Dia Examples
Dia exports graphics into vector and pixel formats as well as TikZ/PGF macros.
you could use svg, open it in inkscape and use the workflow as in the accepted answer from Exporting from Inkscape to LaTeX - via TikZ
Inkscape also offers the possibility to use connectors, but in my view dia ist the best tool to start, then maybe use inkscape to give it the final touch.