Dr. Jeffrey H. Kingston
Lout is a document formatting system, based on a text file format. It offers similar functionality to LaTeX and troff. The system is mature and has not changed for some years now.
Jeffrey H. Kingston. The Lout Document formatting system System (gzipped tar file, 2.2M). The current version of Lout.
Jeffrey H. Kingston. A User's Guide to the Lout Document Formatting System (PostScript, 4.7M) or (gzipped PostScript, 0.8M).
Jeffrey H. Kingston. RTR: A program to convert between Lout and BibTex references (C source file). I do not maintain this software.