The collection includes:

– Michael Barr's package designed for general usability in a variety of mathematical disciplines;
– package which is specifically aimed at category theory diagrams;
– the circuit-diagram macros;
– Pedro Quaresma's macros for commutative diagrams, using LaTeX picture mode;
– Anders Svensson's macros for commutative diagrams, using dvips “PostScript \specials”;
– long-established commutative diagram macros, which are designed to provide high power in a standard (La)TeX environment; and
– Kris Rose and Ross Moore's package which can be used for a variety of graphs and diagrams.

To download, or to read documentation of a package, follow the link above to the package's more detailed catalogue outline. The archive does not offer direct facilities to download this collection of ‘competing’ packages as a single whole.

The author is The CTAN team.