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Fast Light Toolkit (FLTK) is a cross-platform widget (graphical control element) library for graphical user interfaces (GUIs), developed by Bill Spitzak and others. Made to accommodate 3D graphics programming, it has an interface to OpenGL, but it is also suitable for general GUI programming.
Applications, Architecture & Use
Explore the main themes, entities and connections around FLTK. Start with the topic map, then use the sections below for research and deeper semantic analysis.
Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Browse the full topic structure. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
See the strongest relationship patterns around the current topic before diving into the raw triples.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
branch gui library development use user interface gtk open-source software widget also release version now programming features stable written system
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| FLTK | License | GNU Lesser General Public License version 2 with an exception to allow static linking | 1.00 | infobox |
| FLTK | Operating system | Unix-like with X11 or Wayland, macOS, Microsoft Windows | 1.00 | infobox |
| FLTK | Preview release | experimental-2022-01 (January 23, 2022; 4 years ago (2022-01-23)) [±] | 1.00 | infobox |
| FLTK | Release | 1998; 28 years ago (1998) | 1.00 | infobox |
| FLTK | Repository | github.com/fltk/fltk | 1.00 | infobox |
| FLTK | Stable release | 1.4.5 / April 25, 2026; 3 months ago (2026-04-25) | 1.00 | infobox |
| FLTK | Type | User interface library | 1.00 | infobox |
| FLTK | Website | www.fltk.org | 1.00 | infobox |
| FLTK | Written in | C++ | 1.00 | infobox |
| PSK31Giada | instance of | allows data transmission and text chat via digital modes | 0.80 | text |
| looper | instance of | allows data transmission and text chat via digital modes | 0.80 | text |
| micro-sequencer | instance of | allows data transmission and text chat via digital modes | 0.80 | text |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.