Free diagramming software for linux

Ghost Diagrams is a project that takes sets of tiles and tries to find patterns into which they may be formed. The patterns it finds when given randomly chosen tiles are often surprising.

It turns out that tiling patterns are a form of computation of equal power to Turing machines, lambda calculus, and cellular automata. For example, here is a tileset implementing "Rule 110", a cellular automaton known to be capable of universal computation.

Considerations similar to the halting problem and Godels theorem apply. There is no upper limit to their capacity to surprise us. Furthermore, tiles have an intuitive quality that other forms of computation lack. You can see how they fit together.

An organism is more than the sum of its organs. When the organs are fitted together, the organism becomes something more. This surprising something more we call "spirit" or "ghost". Ghost Diagrams finds the ghosts implicit in simple sets of tiles.

Graidle (Graph aid), is a project that is proposed to create an application web for the realization of graph; it comes divided in four parts:
Graidle Fx proposed like didactic instrument for the visualization of diagrams of function to one variable;
Graidle SQL Friendly assists the creation of a graph starting from one query;
Graidle FrontEnd supplies to the user a graph personalized second every own requirement;
Graidle Class is the class that comes supplied for the development;
The realization of the site is apt to the demonstration of the operation of the same application, that it can be more complete visualizing sources releasable liberations in the appropriate Download section. We will have therefore one dedicated section to every part of the plan: In Function the customer will insert the number of functions to visualize, the interval and the quality of the curve and will come created a diagram to the flight; With the FronEnd they will be able to be inserted until to nine series give to you, choosing of the type, the name, the options like the colors, the title it, maximum and minimal, the lines grid etc... the customer will be able to save the just graphical one and to insert it in situated presentations or web; From SQL is a pure demonstrative and educational section, that it concurs to create given diagram of one query SQL; between the multiple usefullnesses there is that one of being able to visualize in realtime the graph of some give you present in database without or that one of being able to enclose to the tables of resultset a diagram that can clarify the visualization of gives to you; the handbook for who is available also wanted to externally use the class to this situated one;
The Graidle project is realized in PHP with the aid of GD2 library.
Enhancements:
- Introducing of Horizontal Histogram graph type;
- Introducing of Extended Legend for Horizontal Histogram;
- Introducing of new legend management system for a better visualization of all type of strings;
- Introducing of Selection standard CSS color on setValue function;
- New setMultiColor() to visualize different color on same value serie ;
- New setColors() to add one or more colors;
- New Bold Font type ;
- New setFontBD() method;
- Modified carry2file() for select patch and filename;

DiaDBDesigner is a standalone module for constructing databases with the help of the diagram creation program Dia.

In an easy to use environment, with DiaDBDesigner you can join multiple diagrams together to form one model of interconnected tables.

Dia is designed to be much like the commercial Windows program Visio. It can be used to draw many different kinds of diagrams.

Dia project currently has special objects to help draw entity relationship diagrams, UML diagrams, network diagrams, flowcharts, and simple circuits. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.

It can load and save diagrams to a custom XML format (gzipped by default, to save space), can export diagrams to EPS or SVG formats and can print diagrams (including ones that span multiple pages).

dia2sql is yet another dia2sql converter. It uses libxml2 to parse UML objects from a Dia diagram and generates corresponding SQL code to create the tables specified in the UML diagram
It takes one or more filenames and outputs to stdout. Multiple files are considered as one database by merging multiple tables with the same name.
Enhancements:
- This release has been rewritten in C and adds support for database views.

UMLGraph facilitates the declarative specification and drawing of UML class and sequence diagrams.
One can specify a class design using the Java syntax complemented by Javadoc tags.
Running the UmlGraph doclet on the specification generates a Graphviz diagram specification that can be automatically processed to create Postscript, GIF, SVG, JPEG, fig, or Framemaker drawings.
Similarly, sequence diagrams are specified using declarative pic macros and compiled with the GNU plotutils pic2plot program into a PNG, PNM, (pseudo) GIF, SVG, AI, Postscript, CGM, FIG, PCL, HPGL, Regis, or TEK drawing.
Enhancements:
- This version improves its invocation interface so that it can be run directly as a jar file.
- It has support for sending results to the standard output for direct piping into dot.
- The distribution includes an example shell script and batch file for invoking UMLGraph.

AutoDia is a modular application that parses source code, XML or data and produces an XML document in Dia format (or images via graphviz and vcg). AutoDias goal is to be a UML / DB Schema diagram autocreation package.
The diagrams its creates are standard UML diagrams showing dependancies, superclasses, packages, classes and inheritances, as well as the methods, etc of each class.
AutoDia supports any language that a Handler has been written for - see below for an up to date list..
Autodia now outputs the following formats :
- Graphviz (using dot to generate jpg, png, etc)
- dot
- vcg
- xvcg (using xvcg to output postscript, etc)
- dia (using a new custom directed graph algorithm to layout diagrams)
- HTML/XML/Anything (if you write your own template)
- Experimental SpringGraph (native perl directed graphs similar to graphviz) now included
- Experimental Umbrello XML/XMI (requires fixing)
Autodia now parses the following forms of input
- Perl
- Python
- PHP
- Java (some issues with version 1.4) no longer fully supported (it used to work, Java broke its APIs now it doesnt, fixes welcome)
- C++
- Torque (XML DB schema)
- DBI (perl database interface handles)
- SQL
- Umbrello (experimental)