Dvips is a program to convert TeX DVI files to PostScript. It is used in the Web2C implementation of TeX and friends.
It is no longer distributed as a standalone programs. The sources are included in the TeX Live distribution.
The Dvips manual is available online in HTML and PDF is available online. You may also find it in your local Info system if you have one; try running info dvips or M-x info in Emacs.
At one time, there was a variant program Dvipsk, which adapted Dvips to Kpathsea. Now the Kpathsea support is in the original sources, and there is only one program.
Programmer wanted: it would be great to add OpenType and perhaps TrueType support to dvips; perhaps some of the code from pdftex could be adapted. If you have time, knowledge, and interest to work on this, please email firstname.lastname@example.org.