Fast Light Toolkit

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Stable Release: v1.3.4
Stable Release Info: View Release Info
Snapshots: v1.4.x-20190118-6bc3fa37
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
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. (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 ]
(65 votes, 4 comments)
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Top 10 Links [ Show All ] top right image
  Fl_Firmata 0.2  
  FreeMajor 2018-11-08  
  fldigi 4.0.18  
  SpiritVNC - FLTK 0.3.11  
  Fltk_Contour 5.3.2  
  BP-ANNA (Artificial Neural Network) 1.9.2  
  flPhoto 1.3.1  
  fl_logbook 1.2.4  
  flimage 1.13.0  
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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 below.
    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 ApplicationRecent Articles [ Show All ]

FLTK Moved to Git and to a new Server  Sticky
05:03 Dec 01, 2018 by AlbrechtS, 2 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 ]

Git for FLTK Users  Sticky
07:14 Dec 02, 2018 by AlbrechtS, 0 comments
How to use Git for downloading and using FLTK. Read ]

Git for FLTK Developers  Sticky
06:53 Dec 02, 2018 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
15:13 Dec 01, 2018 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 Jan 18, 2019 by WebsiteCron, 0 comments
A new weekly snapshot of FLTK 1.4.x (master) is now available Read ]

Gitter community channel for FLTK
09:00 Dec 22, 2018 by Thecarisma, 0 comments - A gitter channel is created for Fast Light Toolkit and it applications in order to facilitate and speed up and simplify communication, requests and queries. Read ]

FLTK code repository on Github
11:43 Dec 04, 2018 by AlbrechtS, 2 comments
Our FLTK code repository is on GitHub since Dec 01, 2018.
Subversion access has been closed at the same time. Read ]

TEST: Arbitrary UTF-8 Text (please ignore)
04:06 Oct 12, 2018 by AlbrechtS, 0 comments
Lorem Ipsum and other UTF-8 text to test database conversion. Read ]

How does resizing work?
01:50 Sep 20, 2018 by matt, 5 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 ]

Gmsh 4.0
16:51 Aug 22, 2018 by geuzaine.acm.caltech, 0 comments
Gmsh 4.0.0 is out, with a new C++, C, Python and Julia API and a ton of other enhancements! Read ]

FeedingBottle 3.3
13:43 Feb 11, 2018 by ZhaoChunsheng, 0 comments
FeedingBottle has been open source now. Read ]

Hunt the wumpus 0.9
09:08 Nov 17, 2017 by ans, 0 comments
The game based on FLTK using an MVC (Model View Controller) pattern Read ]

Windows how-to: create a stdout/stderr console at runtime for /subsystem:windows app
11:59 Sep 19, 2017 by greg.ercolano, 1 comment
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 ]

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