#1 alternative to Microsoft Project : Project Management & Gantt Chart
Java persistence using JDO, JPA or REST
JaxoDraw: Feynman Diagrams made easy!
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Open Source Openbravo POS convert to Commercial Retail ERP and POS
ReportServer is a modern and versatile business intelligence platform
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Project to dinamically export queries to Excel, PDF and Jasper Viewer
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Mathematical Parser for Java
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Web source code compressor