FewDee is an incomplete, experimental, mostly 2D, library focused on games prototyping. It is written in the D Programming Language, and uses the good and old Allegro Library.
FewDee is incomplete because it still has rough edges and missing features.
FewDee is experimental because it has one or two unorthodox design bits, which weren't much tested so far.
FewDee is mostly 2D because its own features provide only 2D support, but you can use OpenGL (and Direct3D. I suppose) code along it.
FewDee is focused on games prototyping because that's the only thing it was use so far. In the future, it may prove itself capable to be used in some kinds of "real games".
FewDee is written in D because that's the language I am currently enamored with. It's pretty good, you should try it, too :-)
FewDee uses Allegro -- and this is an understatement, as you actually have to use some of the Allegro API along with FewDee. (By the way, I am using the DAllegro5 bindings.)
Generally, FewDee doesn't require you to use the facilities it provides. You pick what you like, and use the Allegro API (or roll your own wrappers) for the rest.
Here is a selection of FewDee features:
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Event Manager: Allows to handle low-level events directly; you just add (or remove) delegates that get called as events are generated.
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Input Manager: Abstracts away low-level events ("joystick button pressed"), allowing you to deal with high-level game commands ("jump") and states ("walking direction"). There are helpers to make an user-customizable input system, and to save and restore the input configuration.
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Sprites: Group sets of related images, configure and play animation sequences.
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Sprite animation events: Generate events at specific sprite animation frames; handle these events to synchronize audio effects (or anything else) with animations.
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Easing functions: Nice ways to interpolate between values. Easily make smooth changes to properties like position, color, scale, rotation and sound volume and balance.
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Main game loops: Multiple variations of the main game loop are supported out-of-the box (and you can roll your own, if you wish).
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State Manager: The good and old game state idiom. Neatly separate the title screen from in-game screen from the inventory screen, from the map screen, from...
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Audio: Play audio samples and audio streams. Change their volume, balance and playing speed.
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Resource Manager: Simplifies the task of managing images, sounds, fonts and the like.
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Scene graph: FewDee includes a very preliminary scene graph implementation.
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Scene graph events: Generate and handle events when a scene graph node is clicked, has the mouse moved over it, etc.
FewDee isn't really ready for wide adoption. Sure, you can use it, but you may find difficulties, especially setting it up and building it. And I am pretty sure that there will be plenty of breaking API changes in the future.
FewDee is developed under Linux, with near to none testing under Windows (though Windows support is a must for me, and I successfully used an ancient version of the library under Windows).
It doesn't have a proper build system -- only a half baked Makefile.
It doesn't have a manual, though it has pretty complete inline documentation and a set of examples.
As I write this (October 22nd, 2013), I wrote a single game protoype to showcase FewDee: Anytris (and it doesn't really use much of what FewDee offers.)
Before that,I have used an early version of FewDee to develop a single game prototype. After that, I redesigned and rewrote lots of things that didn't worked well in this first experiment.
My plan now is to focus on using FewDee on some game prototypes, instead of working on the library itself. So, the next FewDee updates are likely to reflect my own needs on those prototypes.
Concerning the usage of Allegro: I am using it because it worked for me. Right now, I don't have any plans (nor reasons!) to replace it with something else. That said, in my imagination I have already flirted with the idea of completely hiding the Allegro API, and even supporting multiple "backend libraries" (SDL 2 would be an obvious choice).
I don't really have a vision for the future of FewDee. I guess it will evolve organically, reshaping itself as better ways to do things are figured out and new features are added. (As with any project, it could also die -- which also qualifies as "organic", I guess :-) )
FewDee is licensed under the Zlib license, which is the same license used by Allegro (and SDL 2, for that matter).
FewDee was designed and implemented by Leandro Motta Barros.
Its "official" Mercurial repository is located at BitBucket, and there is a Git mirror at GitHub.