Winteracter is a graphics and GUI toolset for Fortran 90 or later. It was originally developed and sold by Interactive Software Services Ltd. between 1997 and 2024, growing out of the earlier I.S.S. INTERACTER package (1989-2001). It comprises various visual development tools and a substantial subroutine library, which is compatible with many modern Fortran compilers.

The toolset is now maintained on a non-commercial, voluntarily supported basis. Users who held an up to date (v16.0) licence at the time of the I.S.S. closure can obtain the latest version, via this site.


Current version : 16.20c

Package Highlights

  • Create desktop GUI applications using Fortran 9x/200x
  • GUI controls based on native Windows/Motif components
  • Totally Fortran based, no mixed language programming
  • No low level API access required
  • Visual tools simplify GUI design
  • Meaningful names make code easier to read/maintain
  • Mature platform-independent graphics
  • Substantial operating system interface
  • Numerous graphics hardcopy/export formats supported

Recent News

Recent Forum Posts

TopicLast post byRepliesForum
undefined reference to yy3dpickfacet_ and yy3dproject_robertopsouto
16th Sep 2025 13:03		7General support
Spaces in folder paths !!Lawson
9th Sep 2025 22:47		5General support
Winteracter License TransferRussErick
16th Aug 2025 16:17		2General support
NVERT-2 triangular sub-facets in convex polygonsLawson
19th Jul 2025 12:14		133D modelling
Linker error: ifx 2025.2.0 with Winteracter 16.20aPhilW
27th Jun 2025 16:52		2General support
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