SPF/PC v4 for MS-DOS, FreeDOS, x86 (github.com)

MOSHIX’s GitHub repository provides SPF/PC v4, an MS-DOS (including FreeDOS/x86) “abandonware” SPF editor from around 1993. The project describes it as an ISPF-like panel and editing environment with an included REXX implementation, intended to run on DOSBox and also usable on Windows and MS-DOS.