So you want to create a flowchart ...

Here are some options for creating a flowchart, from best to worst:

1. Microsoft Visio - hopefully you have access to an installation of Visio as it is the best tool for most diagramming purposes (consider UMLet for UML diagrams).  Even if you don't have it on your own machine, you should see if you can access it on a work computer, e.g., via Citrix or Remote Desktop
2. Google Docs - The "Drawing" document type is surprisingly powerful, considering this is a web application.  A few drawbacks:
1. Difficulty getting connecting arrow-ended lines completely horizontal; sometimes just a few degrees off but noticeable
2. Application does not appear to have a right-angle, arrow-ended connecting line
3. When entering text for a node in the diagram, upon pressing Enter to save the text, the text can take several unnerving seconds (5+) to appear on the node.  This may be related to a slow network connection and the text not appearing until it has been saved to the Google Docs server from the web browser.  If you double-click on your blank node, your text will appear in the edit box, but again, it may take time to appear on the actual diagram node.
4. Connecting lines cannot have text associated with them.  Have to add in a text shape and Group with connecting line
3. Open Office Draw - looks promising at first but it is horrid.  I got into a situation where suddenly text I had entered for a node several steps before became misaligned and when I entered text for a connecting line, it was in white, despite never doing anything that should cause either to happen.  Worse yet, I could not Undo to get back to a good state for my diagram