Open System Architect (OSA) is an Open Source Application used for modeling a system. Open Sytem Architect currently supports data modeling (physical and logical) with UML in the works.  The free factor makes OSA particularly interesting for students but OSA is powerful enough to compare favorably with products costing thousands of dollars.

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TaskFreak is an Open Source Web Based Task & Project Manager Tool. TaskFreak is simple in its interface and very effecient in its performance.

Create tasks with ease and order tasks by priority and deadline, organize by project and context. Easily accessible drop down menu to create tasks and manage projects.

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Bytefx is a Free Lightweight JavaScript Library to help creating special effects for your web page. Bytefx is just what you need for your web pages, with a minimum overload and a good, fast and cross browser code.

This is a free low level effects library for creating some simple, beautiful yet useful effects for your  sites. This free javascript library is not a complete framework as mootools but it could be the base for complex libraries.

Bytefx is available under MIT licensee which makes it an Open Source JavaScript Library.

Website: http://devpro.it/bytefx/

Satchmo is an Open Source Ecommerce Shopping Cart Software. This Free Shopping Cart Software originally designed in Python to try to overcome some of the shortcomings of PHP. Satchmo now is using the Django web application framework. It includes many features such as PDF invoice generation, automatic thumbnail generation, inventory tracking and a whole lot more.

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GnuCash is an Open Source Small Business Financial Accounting Software for personal or small-business usage.GnuCash allows you to track bank accounts, stocks, income and expenses.

This Free Small Business Financial Accounting Software is flexible, powerful and easy to use. As quick and intuitive to use as a checkbook register, it is based on professional accounting principles to ensure balanced books and accurate reports.

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scripty2 is an Open Source Flexible JavaScript Framework for advanced HTML-based user interfaces. scripty2 is a complete rewrite and reimplementation of script.aculo.us, with are modular structure intended to ease the development of highly customized user interface effects and behaviors.

This powerful, flexible JavaScript framework helps you write your own delicious visual effects & user interfaces.

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OpenProj is an Open Source Free Project Managemetn Software by Serena Software. This Free Project Management Software is a desktop replacement of Microsoft Project. OpenProj has equivalent functionality, a familiar user interface and even opens existing MSProject files.

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Liferay Portal Software is the world’s leading Enterprise Open Source Portal Framework, offering integrated Web publishing and content management, an enterprise service bus and service-oriented architecture, and compatibility with all major IT infrastructures.

Leveraging nine years of innovation and invaluable feedback from our active open source community, Liferay Portal Software offers an award-winning UI, multiple layers of personalization and desktop conventions that make for unbeatable ease of use and quick adoption.

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JFreeChart is an Open Source Free Java Chart Library for java(tm) platform that makes it easy for developers to display professional quality charts in their applications.

This Open Source Free Java Chart Library supports bar charts, pie charts, line charts, time series charts, scatter plots, histograms, simple Gantt charts, Pareto charts, bubble plots, dials, thermometers and more.

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qdPM is an Open Source Project Management Software helps you to organize projects and save time. This Free Project Management Tool is designed for small development teams.

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