Exercise: To cite, or not to cite, that is the question...

Suppose you are writing a paper on your latest research and are putting together the reference list. During your research you have used all the software mentioned below.

• Ubuntu - operating system
• Microsoft Word - text editor (used to write the paper, take notes)
• Git - version control software
• NumPy - Python math library (used in nearly all Python-based research software)
• ESMValTool - diagnostic tool/library for Earth System Models (Used in many climate research projects)
• ClimAn - your own domain specific python library (defines various analytical functions that you used in your climate research)
• The original code on which you based your library ClimAn
• Your own local Python script, used to execute the analysis

Which software would you cite and which not? Why?