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. However, in June 2023 I did revise the C source code of Lout so that fewer warning messages are printed by the current GNU C compiler when the Lout source is compiled, without changing the functionality of Lout itself.
Current versionJeffrey H. Kingston. The Lout Document formatting system System, Version 3.41 (gzipped tar file, 2.2M). The current version of Lout, posted in June 2023.
Jeffrey H. Kingston. A User's Guide to the Lout Document Formatting System, Version 3.41 (PostScript, 4.7M) or (gzipped PostScript, 0.8M).
Jeffrey H. Kingston. The Lout Document formatting system System, Version 3.40 (gzipped tar file, 2.2M). The previous version of Lout.
Jeffrey H. Kingston. A User's Guide to the Lout Document Formatting System, Version 3.40 (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.