Fast Light Toolkit

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Latest Release: 1.3.5
Release Notes: View Release Notes
Weekly Snapshot: 1.4.x-20201030-70da3a34
Developer Roadmap: View Roadmap
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FLTK (pronounced "fulltick") 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.

FLTK is designed to be small and modular enough to be statically linked, but works fine as a shared library. FLTK also includes an excellent UI builder called FLUID that can be used to create applications in minutes.

FLTK is provided under the terms of the GNU Library Public License, Version 2 with exceptions that allow for static linking.

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Current Poll [ Show All ] top right image

Note: This poll is closed.

Do you need / use the "FLTK Apps" and "Links" tabs on the FLTK website? We may want to close these parts if users don't want or need them. You may pick more than one answer.
(please pick all that apply)
Yes, I'm often looking for interesting FLTK apps.
Yes, please keep, but I don't use them frequently.
No, I don't really need these apps and links pages.
No, I never use them, please remove.
I use FLTK Apps but not Links.
I use Links but not FLTK Apps.
I used them when I was new to FLTK.
I believe they are important for new users.
I like them, but they should be better accessible.
I abstain.
Results ]
(442 votes, 4 comments)
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Top 10 Links [ Show All ] top right image
  SpiritVNC - FLTK 0.4.4  
  RNAStructViz v2.4.1-testing  
  flrig 1.3.51  
  Hunt the wumpus 0.9  
  ClickShow 4.1  
  FLTKYahtzee .01  
  fltklayout 0.1  
  ClickShow 4.2  
  fldigi 4.1.15  
  Robert Ark FLTK Tutorial 1.1  
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Site News

Dec 01, 2018: The FLTK Team is proud to announce that we moved our source code repository to Git and the FLTK website to a new server. Please see article FLTK Moved to Git and to a new Server.

May 2013: Back in April 2013 we had to move the fltk.general and fltk.coredev lists to Google Groups. Please join us there to reconnect. All postings from today on back through 2004 are available on the FLTK Forums page.

FLUID Application Recent Articles [ Show All ]

Git for FLTK Users  Sticky
06:24 Feb 11, 2019 by AlbrechtS, 0 comments
How to use Git for downloading and using FLTK. Read ]

Git for FLTK Developers  Sticky
06:24 Feb 11, 2019 by AlbrechtS, 0 comments
How to use Git as a FLTK developer to push your changes to the FLTK Git repository - work in progress... Read ]

What are the Versions of FLTK?  Sticky
03:56 Mar 23, 2020 by engelsman, 3 comments
There is a lot of confusion, especially for people who are new to FLTK, about the different versions that are available, what they offer, and when they will be released. This article attempts to clarify matters. Read ]

FLTK 1.4.x Weekly Snapshot (master)
00:05 Oct 30, 2020 by WebsiteCron, 0 comments
A new weekly snapshot of FLTK 1.4.x (master) is now available Read ]

Tilemap Studio 3.2.1
18:43 Aug 23, 2020 by roukaour, 0 comments
Tilemap Studio is a tilemap editor and creator for Game Boy, Game Boy Color, Game Boy Advance, and SNES projects. It has 11 GUI themes based on different operating systems, toolkits, or other applications. Read ]

How does resizing work?
08:38 Aug 04, 2020 by matt, 6 comments
Layout management is an important part of creating a user friendly UI. FLTK uses the 'Fl_Widget::resizable()' method to achieve almost any kind of resizing behavior. Read ]

Windows how-to: create a stdout/stderr console at runtime for /subsystem:windows app
10:42 Jun 05, 2020 by greg.ercolano, 6 comments
If you have an FLTK Windows GUI application built with /subsystem:windows, you can create a DOS style window and redirect stdout/stderr to it at runtime. Read ]

fltklayout 0.1
19:24 May 25, 2020 by craig.inglis, 0 comments
A small C++11 library for managing widget layouts with a WYSIWYG designer Read ]

18:01 Dec 06, 2019 by giri, 0 comments
ESDBomber - a cross platform multiplayer bomberman clone. Read ]

RNAStructViz v1.9.1-testing
13:11 Nov 19, 2019 by RNAStructViz, 0 comments
RNAStructViz is a GUI-based cross platform visualization, comparison, and analysis tool for RNA secondary structures. Read ]

FLTK Moved to Git and to a new Server on Dec 1, 2018
03:34 Aug 25, 2019 by AlbrechtS, 0 comments
The FLTK Team is proud to announce that we moved our source code repository to Git and the FLTK website to a new server. Read ]

FLTK 1.3.5 (final) released on Mar 3, 2019
03:29 Aug 25, 2019 by AlbrechtS, 0 comments
FLTK 1.3.5 is a maintenance release with many enhancements and bug fixes. It is expected to be the last release in the 1.3.x series. Read ]

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