Legal advice on use of free web based tools?

The copyright restrictions do not permit use of images downloaded from the
web in company applications (this is understandable).
I wonder, if the same restrictions should apply to custom images created
with free web based tools.

The case:

I have made Ajaxie progress indicator at this website:
http://www.ajaxload.info/ (recommended, took me 1 min, many customization
options).
Since it is a custom image, which I have made with custom colors, can I use
it in a corporate application?

Does the same rule apply, to text files created with Google Docs?
Does it apply to use of Google Calendar, Firefox? Can I link to Wikipedia or
IxDA list archives from the company wiki?
Thanks,
Oleh Kovalchuke

PS Am I going legally mad?