CmLib (color map library) is a collection of color maps, which originate from different sources and that have been converted to a uniform format.
CmLib comes with PyQt widgets to view the collection and select a color map. However, you don't need Python to use the color maps because the data is stored in comma separated files, which can be read in any programming language.
For more info, see: https://github.com/titusjan/cmlib