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FLTK

FLTK is a cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows, and MacOS X. FLTK provides modern GUI functionality without the bloat and supports 3D graphics via OpenGL and its built-in GLUT emulation.

homepage: https://www.fltk.org

Available installations

FLTK version Supported CPU targets Supported GPU targets EESSI version Module
1.3.8 generic: aarch64, x86_64
Arm: a64fx, neoverse_n1, neoverse_v1, nvidia/grace
AMD: zen2, zen3, zen4
Intel: haswell, skylake_avx512, sapphirerapids, icelake, cascadelake
(none) 2023.06 FLTK/1.3.8-GCCcore-12.3.0
1.4.4 generic: aarch64, x86_64
Arm: a64fx, neoverse_n1, neoverse_v1, nvidia/grace
AMD: zen2, zen3, zen4
Intel: haswell, skylake_avx512, sapphirerapids, icelake, cascadelake
(none) 2025.06 FLTK/1.4.4-GCCcore-14.2.0