Part 1
Another free and open-source Mac drawing app to consider is GrafX2. It’s a drawing tool with a laundry list of different features that cover everything from pixel art to graphics for games. Some of the features include image editing, animations, dual-view mode, shading mode, and a variety of helpful shortcuts. A software with a price. FreeCAD – Open Source 3D Modeler. The FreeCAD is for all the novice students who wants to learn 3D modeling but do not want to buy the premium software. A simple to use 3D modeling software recommended for all. Autocad Civil 3D – Civil Engineering Software. Pixologic – Best 3D Modeling Software from Zbrush.
1. Dia Diagram EditorFeatures and functions:
· The Dia Diagram Editor for Mac excels over its counterparts for the feature of providing technical expertise in drawing patterns and versions.
· Both technical or IT- proficient people as well as non-technical users can feel at ease and derive utility out of the program.
· Newer shapes specific to user requirements can also be supported by the editor on writing elementary files in xm_x_l.
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· Cross-platform operations are supported well.
· Be it an UML structure or Network diagram, flowchart or Entity-Relationship diagrams, the Dia Diagram Editor handles all with precision.
Pros of Dia Diagram Editor:
· Symbols and ob_x_jects have been predefined and offered as part of an extensive library.
· Thisfree drawing software for Macenables professional drawing and design experts to achieve their jobs efficiently, for the program offers sharp rendition of technical drawings and flowcharts.
· The program provides a proper canvas to work upon. Technical operations starting from edit and scrolling across images, to la_x_yering and managing accurate magnification ratio in images are all properly handled by the software.

· Installation of the Dia Diagram Editor has not been reported to cause much chaos, just like the clean process of uninstalling the same.
Cons of Dia Diagram Editor:
· Program requires Save at regular intervals, for the Dia Diagram Editor crashes down often.
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· The colour of the text cannot be altered.
· Edit or delete operations cannot be performed on selected portions of the text, which is a major drawback.
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User comments/reviews:
· I was looking for a simple app to help generate Flowcharts. This does it perfectly well.
· It's fabulous. Do you have to diagram something? Don't hesitate—this is your app. Get it and start diagramming. Woo!
· I use it to create diagrams and export in several formats, such as png and eps. I is simple and easy to use.
http://sourceforge.net/projects/dia-installer/reviews/
Screenshot:
