I want to make charts and i tried google chart api module,highchart and others but it seems that is not stable enough.
I am asking if there is a way or a module to make graphs and chart ( like the drupal site for example) and to generate some reports by the easy way .
Thank you ..
Do you mean the new Sparklines in the sidebar of the projects page? For example http://drupal.org/project/google_plusone
They were made with library flot: http://www.flotcharts.org/
http://joeloughton.com/blog/web-applications/sparklines-using-flot/
And the the Statistics charts, also were made with flot.
For example:
http://drupal.org/project/usage/google_plusone
If you google "flot drupal.org" you will find different modules (integration with Views, etc) and tutorials