Soulsphere. org is the personal website of Simon Howard, showcasing a broad collection of software, games, technical projects, and writing. Its best-known work includes Chocolate Doom, a historically accurate Doom source port, and Freedoom, a crowdsourced Doom IWAD file.

The site also features Doom-related utilities and tools, including Vanilla Utilities, DEH 9000 for programmers working with Dehacked, and wadptr, a Doom WAD file compressor. Other projects span game development and preservation: SMMU is an older Doom source port, while a collection of articles explores Doom and its history. Beyond Doom, Simon’s work includes Lhasa, a free LHA implementation; a liberally licensed C algorithms library; and ipxbox, a dedicated server for DOSBox IPX networking.

The site also presents smaller experiments, such as Yocton, a minimalist stringly typed object notation, and Yoctolisp, a Lisp interpreter written in a weekend. Additional offerings include reverse engineering notes on Sinclair QL disks, a daily Doom megawad generator, a password-learning program, and assorted tools