Free static and dynamic software for linux

Yet Another Dynamic Engine (YADE) is an extensible framework that is designed with dynamic libraries in a way that it is easy to add new numerical models and objects.
There are four different models: Discrete Element Method based on spheres, a second method based on tetrahedra, modelling with lattice elements, and Finite Element Method.
Various different methods and algorithms for numerical simulation currently exist. Yade tries to extract their underlying abstractions using following examples:
- Finite Element Method (FEM, [2]),
- Discrete Element Method (DEM),
- Coupling FEM with DEM,
- Mass Spring System,
- Lattice Beam Model,
- Tetrahedron Discrete Model.
Those abstractions are implemented in C++ conforming to Object Oriented design principles. They provide interface to plug-in different modelling methods.
Yade framework is intended to work with other numerical methods than those mentioned above.
Advantages:
- allows numerous simulation methods in the single framework, so coupling them becomes possible,
- plugins can import data from other software,
- thoughtful code design promotes code reuse and improvement,
- open source development model allows community feedback.
Disadvantages:
- implementing models requires adhering to framework design,
- Yade framework is a new emerging software, still in beta phase.
- if you know more disadvantages, let us know!
Enhancements:
- This release has major improvements in the code, and directory cleanup was done.
- The build system was changed from qmake to scons.
- A complete Lattice Geometrical Model was added as a result of PhD defense by one of yades authors.
- Several improvements in Discrete Element Method, capillary law, and triaxial test.
- Among smaller improvements, it is possible to select bodies by clicking them and moving around with the mouse.
- Interaction forces are drawn between bodies, and can be seen as bars with strength related to bar thinckness.

Dynamic MP3 Lister was a project I started a long time ago to create dynamic lists of MP3s quickly and easily.

Features MP3 Information extraction for things like bitrate, channels, playtime and more.

Please note that this script is discontinued, and is only shown here now as an example of my work.

Dynamic Imager provides a small product with which you can generate dynamic images given a text.
This enables you to rotate text in browsers that do not support that.
The DynamicImager product is a small utility product that uses PIL to generate images on the fly, given a few parameters, like the font to use, a text, a background color, etc.
This enables you to rotate texts in browsers that normally do not support that option, but you can do much more.
The product currently supports:
- font
- text
- fill color
- background color
- width
- height
- rotation in degrees
- x offset for text
- y offset for text
Enhancements:
- includes a demo with all features of the product

Dynalbum is a fully dynamic automatic Web photo album generator. The album includes an index page with thumbnails, navigation tools on each album page, and four sizes of each picture.
The entire album is dynamically generated from a directory of JPEGs, TIFFs, PNGs, and GIFs when it is accessed. Unlike other photo album generators, it doesnt clutter files with thumbnails and static HTML.
DynAlbum generates each page and each scaled image (including thumbnails) dynamically every time it is accessed. This means that theres no need to keep static copies of anything but the original pictures.
INSTALLATION:
Copy the dynalbum.py program to the file "index.py" in your image directory. You need to enable mod_python for this directory. This can be accomplished either in your httpd.conf (/etc/httpd/conf/httpd.conf or /etc/httpd/conf.d/python.conf) or in a ".htaccess" file.
The .htaccess file is placed in your image and adusts web server parameters for that directory. In order to use a .htaccess file you may need to enable support using the "AllowOverride" directive in the global apache configuration.
httpd.conf example:
DirectoryIndex index.py
AddHandler python-program .py
PythonHandler mod_python.publisher
PythonInterpPerDirectory On
.htaccess file example:
DirectoryIndex index.py
AddHandler python-program .py
PythonHandler mod_python.publisher
PythonInterpPerDirectory On
and change the relevant instance of "AllowOverride None"
in httpd.conf to "AllowOverride All" to enable .htaccess
support in Apache.
Enhancements:
- Generates multi-page image indexes
- Dynamically generates ZIP archives

dynamic window manager or dwm is a dynamic window manager for X11.
As founder and main developer of wmii I came to the conclusion that wmii is too clunky for my needs. I dont need so many funky features and all this hype about remote control through a 9P service, I only want to manage my windows in a simple, but dynamic way.
wmii never got finished because I listened to users, who proposed arbitrary ideas I considered useful. This resulted in an extreme CADT development model, which was a mistake. Thus the philosophy of dwm is simply to fit my needs (maybe yours as well). Thats it.
Main features:
- dwm has no Lua integration, no 9P support, no editable tagbars, no shell-based configuration, no remote control, and comes without any additional tools like printing the selection or warping the mouse.
- dwm is only a single binary, its source code is intended to never exceed 2000 SLOC.
- dwm is based on tagging and dynamic window management (however simpler than ion, wmii or larswm). It manages windows in tiling and floating modes. Either mode can be applied dynamically, depending on the application in use and the task performed.
- dwm doesnt distinguishes between layers, there is no floating or tiled layer. Wether the clients of currently selected tag are in tiled mode or not, you can re-arrange all clients on the fly. Popup- and fixed-size windows are treated floating, however.
- dwm is customized through editing its source code, that makes it extremely fast and secure - it does not process any input data which hasnt been known at compile time, except window title names and status text read from standard input. You dont have to learn Lua/sh/ruby or some weird configuration file format (like X resource files), beside C to customize it for your needs, you only have to learn C (at least editing header files).
- Because dwm is customized through editing its source code, its pointless to make binary packages of it. This keeps its userbase small and elitist. No novices asking stupid questions.
- dwm uses 1-pixel borders to provide the maximum of screen real estate to clients. Small titlebars are only drawn in front of unfocused clients.
- dwm reads from standard input to print arbitrary status text (like the date, load, battery charge). Thats much simpler than larsremote, wmiir and what not...
- It can be downloaded and distributed under the conditions of the MIT/X Consortium license.
- Optionally you can install dmenu to extend dwm with a wmii-alike menu.
Enhancements:
- This release contains certain major bugfixes, especially regarding banning/unbanning client windows.

PHP FastFileCache caches output from dynamic PHP scripts, and stores them in files for fast retrieval under high server load.

PAiN project is a new MUD code base written in Java.
PAiN is a new MUD codebase written in Java. It provides a general purpose persistence engine (PAiN DB) and the ability to do dynamic code reloading.
Main features:
- Pure Java database engine (transparent constant-time object access, tracking of the dirty state, transactions and savepoints support).
- Static server code (connection handling, support for code reloading and base interfaces).
- Dynamic reloadable set of action classes and plugins (virtual world logic code and plugins).
- Graphical tool to administrate server and database
Enhancements:
- PAiNDB: Collections could be saved separately from object image.This option should be used if collection is not the only field of dbobject, it has size of 20-40 items and dbobject fields are changed often. Saving collection separately will reduce flushing and object backup time inside transactions.
- PAiNDB: DbObject.provideSchema() is now static method and required for all non-abstract DBObject impls. This allows to import class schema into db without object instantiation.
- GUITool: fully rewritten, modules concept added.
- Codebase: more admin console commands.
- Tinylyb: roles removed: Reset, ResetGroup. SpaceGroup was renamed to Area.
- Tinylib: more shell implemented(this shell should be used to show multipage output)
- Tinylib: online builder bugfixing.
- PAiNDB: fixed bug with error on objects removal with non-empty StringMap type fields.
- Tinylib: bugs in @build mode fixed. More complete visualization for array-type fields
- Tinylib: number of small enhancements.

smalloc short from Static memory buffer malloc, is an ideal memory manager for Realtime Linux Kernel modules that cant use dynamic memory offered by kmalloc because of the non-realtime nature of kmalloc.

Like malloc(), smalloc() doles out memory to client code. Unlike malloc, however, smalloc takes a static memory buffer (as an initialization parameter). It is this buffer that smalloc manages when doling out memory to client code.

This design makes smalloc ideal for use inside a Realtime Linux kernel module. It also makes it much easire to port userspace code that relies on malloc() in C or operator new() in C++ for memory management to a realtime kernel module.

For example:

(the below is linux kernel code)

< code >

#include "smalloc.h"
#include < linux/slab.h >

#define MEMPOOLSZ (1024*1024*1024)
char *buf;

...

buf = kmalloc(MEMPOOLSZ, GFP_KERNEL); /* 1 megabyte buffer in kernel
module.. */
smalloc_set_memory_pool(buf, sizeof(buf));

...

MyStruct *s;

s = smalloc(sizeof(MyStruct)); /* example of code that uses this
static memory buffer */

< /code >

The above example is a typical usage pattern of smalloc.