Before I start, let me make it clear that my knowledge of molecular science could be written on a single grain of rice. That said, I know how to spot a good bit of software and from what I can see ArgusLab is a very useful tool for anyone working in a research lab, studying or working in the pharmaceutical industry.
The program allows you to draw very complex protein configurations, obtain helical chains of amino acids and folded leaves etc. ArgusLab uses a tree system to organise all the elements to add to any structure before representing this data as a drawing, allowing you to analyse it a visual manner.
The app also contains a PDB bookstore, a peptide converter and many other useful tools that I don't understand. If you're not well versed in molecular science then you won't learn too much from this highly advanced tool but if you do then ArgusLab represents an amazing free tool for your research.