When I print sticker-labels I use LibreOffice Writer and find a template for
the size of labels used, such as these:
http://www.worldlabel.com/Pages/openoffice-template.htm
If you need pictures on your labels, take a look at: http://openclipart.org/
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For the visual-thinking and mind-map proprietary software called Inspiration,
an alternative would be:
http://freemind.sourceforge.net/wiki/index.php/Main_Page (Trisquel package:
freemind)
(If this is one you have already tried and didn't fit your needs, try to
describe the specific features that you require.)
Or check the top of this page for some free alternatives:
https://en.wikipedia.org/wiki/List_of_concept-_and_mind-mapping_software
and the top of this page:
http://freemind.sourceforge.net/wiki/index.php/Alternatives_to_FreeMind