Download of Microsoft Fortran 4.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus.
The default filenames for the program's installer are FPSCDROM.EXE or MSDEV.EXE etc. Microsoft Fortran lies within Development Tools, more precisely IDE. The following version: 4.0 is the most frequently downloaded one by the program users. The actual developer of the program is Microsoft.
From the developer:
It allows you to build and run Fortran programs of virtually any size with up to 4 GB of addressable RAM. Take advantage also of symmetric multiprocessing (on Windows NT), multi-threading, and preemptive multitasking. Includes advanced 486- and Pentium-based optimizations for faster compile, link, and execution.
You may want to check out more software, such as Microsoft Compute Cluster Pack SDK, Microsoft Office 2010: Primary Interop Assemblies Redistributable or Microsoft Visual Basic, which might be similar to Microsoft Fortran.