shiva scientific
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This paper "Buying in to bioinformatics: an introduction to commercial sequence analysis software" provide an in-depth overview.
Link @ http://bib.oxfordjournals.org/content/early/2014/09/01/bib.bbu030.abstract.html?
Here is the link of promised flash tutorial
http://bioinformaticsonline.com/file/view/13911/amino-acid-flash-tutorial
One intersting periodic table here https://image-store.slidesharecdn.com/4d4490d7-6c08-4b54-be7e-bdd048182bc3-original.png
Interactive Periodic Table of the Elements, in Pictures and Words
This periodic table is easy to remember https://elements.wlonk.com/ElementsTable.htm
If you are specifically working on Circos, then please check this stepwise installation tutorial @ http://zientzilaria.herokuapp.com/blog/2012/06/03/installing-circos-on-os-x/