Carrot2 is an Open Source Search Results Clustering Engine. It could cluster the search results from various sources and generates small collection of documents. Carrot2 offers ready-to-use components for fetching search results from various sources including YahooAPI, GoogleAPI, Bing API, eTools Meta Search, Lucene, SOLR, Google Desktop and more.
 <img src="/AppImages/Article/carrot2-search.jpg" alt="" class="float-center"> 
 It is implemented in Java. It has native API implementation in CSharp. Java runtime is not required and the performance is comparable to Java. It has support of REST interface which could be called from PHP and Ruby. 
 If you have search instances running in multiple nodes and search has to perform across the nodes, then you need a way to combine those results, filter and sort them. Carrot2 helps to do this job efficiently. It is well suited to work with Lucene, Solr and Nutch. 
 Carrot2 could be even called as meta search engine. It has built-in functionality to fetch results from all popular search-engines and combine them. It also offers supporting tools like command-line and GUI application to experiment with this product. Firefox and IE search plug-in is also available. 
 
 Demo: <A HREF="http://search.carrot2.org/stable/search" target="_blank">http://search.carrot2.org/stable/search</A>

Carrot2 is an Open Source Search Results Clustering Engine. It could cluster the search results from various sources and generates small collection of documents. Carrot2 offers ready-to-use components for fetching search results from various sources including YahooAPI, GoogleAPI, Bing API, eTools Meta Search, Lucene, SOLR, Google Desktop and more.

Carrot2 - Search Results Clustering Engine

Apache Jackrabbit is a Content Repository fully conforming to JCR specification. Jackrabbit content repository is a hierarchical content store with support for structured and unstructured content, full text search, versioning, transactions, observation, and more. It provides access to its repository via Web Interface, Command line , WebDAV and RMI. The content could be stored in file system or in database. It supports REST API so that it could be accessed from any programming language.

Apache Jackrabbit is a Content Repository fully conforming to JCR specification. Jackrabbit content repository is a hierarchical content store with support for structured and unstructured content, full text search, versioning, transactions, observation, and more.

Jackrabbit - Content Repository in Java

Apache OFBiz is an open source enterprise automation software project. It means ERP (Enterprise Resource Planning), CRM (Customer RelationShip Management), E-Business / E-Commerce, SCM (Supply Chain Management), MRP (Manufacturing Resources Planning), CMMS/EAM (Maintenance Management System/Enterprise Asset Management), POS (Point Of Sale), and so on. 

 Its applications includes Catalog management, Promotion & Pricing management, Order management (sales & purchase), Customer management, Warehouse management, Accounting (invoice, payment & billing accounts, fixed assets), Manufacturing management, General work effort management (events, tasks, projects, requests, etc), Content management (for product content, web sites, general content, blogging, forums, etc) and lot more.

 <img src="/AppImages/Article/ofbiz_img1.jpg" alt="" class="float-center">

Apache OFBiz is an open source enterprise automation software project. It means ERP (Enterprise Resource Planning), CRM (Customer RelationShip Management), E-Business / E-Commerce, SCM (Supply Chain Management), MRP (Manufacturing Resources Planning), CMMS/EAM (Maintenance Management System/Enterprise Asset Management), POS (Point Of Sale), and so on.

OFBiz - Apache Open For Business Project

soapUI is the world leading Open Source Functional Testing Tool, mainly it is used for Web Service Testing. Its features include Web service testing, Load testing, Functional testing, SOAP recording, Service mocking, Integrated reporting and lot more. Sourceforge: <A HREF="http://sourceforge.net/projects/soapui/" target="_blank">http://sourceforge.net/projects/soapui/</A>

soapUI is the world leading Open Source Functional Testing Tool, mainly it is used for Web Service Testing. Its features include Web service testing, Load testing, Functional testing, SOAP recording, Service mocking, Integrated reporting and lot more.

SoapUI - Web Service Testing

MARY is an open-source, multilingual Text-to-Speech Synthesis platform written in Java. It supports German, British and American English, Telugu, Turkish, and Russian. 
 Demo: <A HREF="http://mary.dfki.de:59125/" target="_blank">http://mary.dfki.de:59125/</A>

MARY is an open-source, multilingual Text-to-Speech Synthesis platform written in Java. It supports German, British and American English, Telugu, Turkish, and Russian.

MARY - Text-to-Speech System

Zimbra is the most capable open source email and collaboration suite available today. It provides support for Email, Shared calendar, Document management, Pop3, Address book and lot more. Mails could be tagged and search support is also provided. Zimbra is considered as an alternative to Microsoft Exchange Server.

Zimbra - Email and Collaboration Suite

Alfresco is the open source alternative for Enterprise Content Management (ECM), providing Document Management, Collaboration, Records Management, Knowledge Management, Web Content Management, Image Management, Content Repository, Workflow. It supports CIFS interface to provide file system compatibility on Microsoft Windows and Unix-like operating systems. Alfresco is a content management framework where it could act as backend to store and retrieve the content. API support is available. <img src="/AppImages/Article/alfresco-img1.jpg" alt="" class="float-center">

Alfresco is the open source alternative for Enterprise Content Management (ECM), providing Document Management, Collaboration, Records Management, Knowledge Management, Web Content Management, Image Management, Content Repository, Workflow. It supports CIFS interface to provide file system compatibility on Microsoft Windows and Unix-like operating systems.

Alfresco - Enterprise Content Management System

Liferay Digital Experience Platform is an enterprise-grade platform that enables companies to create and connect personalized digital experiences across web, mobile, social, in store and other touchpoints. It provides the technical foundation (deep integration, security and modularity) for your digital business to orchestrate unique customer experiences, as well as business value features to support a deeper understanding of your customers

Liferay Digital Experience Platform (DXP)

OpenReports supports a variety of open source reporting engines, including JasperReports, JFreeReport, JXLS, and Eclipse BIRT, to provide support for a wide range of reporting requirements and capabilities. OpenReports also includes QueryReports and ChartReports, easy to create SQL based reports that do not require a predefined report definition. OpenReports also supports OLAP via Mondrian and JPivot.

OpenReports - Powerful Reporting Solution

Voldemort is a distributed key-value storage system. Data is automatically replicated over multiple servers. Data is automatically partitioned so each server contains only a subset of the total data. 
Server failure is handled transparently. It is used at LinkedIn for certain high-scalability storage problems where simple functional partitioning is not sufficient.

Project-voldemort - A distributed database, Clone of Amazon's Dynamo

Infinispan is an extremely scalable, highly available key/value NoSQL datastore and distributed data grid platform. The purpose of Infinispan is to expose a data structure that is highly concurrent, designed ground-up to make the most of modern multi-processor/multi-core architectures while at the same time providing distributed cache capabilities. Infinispan offers enterprise features such as efficient eviction algorithms to control memory usage as well as JTA compatibility.

Infinispan - Key value NOSQL data store and data grid

Fast Code Plugin is a free eclipse plugin designed to help write code faster in Java and Php applications. In Java, it has some special features for applications that uses the well known Spring Framework. It helps to generate code snippets based on fields from arbitrary pojo class or class from any package or files in folder, Generates database templates, Spring config files, Boiler plate classes, Junit test code and lote more.

Fast Code Eclipse Plugin

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees. Twitter search uses ANTLR for query parsing, with over 2 billion queries a day. 
 
The languages for Hive and Pig, the data warehouse and analysis systems for Hadoop, both use ANTLR. Lex Machina uses ANTLR for information extraction from legal texts. Oracle uses ANTLR within SQL Developer IDE and their migration tools. NetBeans IDE parses C++ with ANTLR. The HQL language in the Hibernate object-relational mapping framework is built with ANTLR.

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees. Twitter search uses ANTLR for query parsing, with over 2 billion queries a day. 


ANTLR - ANother Tool for Language Recognition

LogicalDOC is a modern document management system with a nice interface, easy to use and very fast. It uses open source Java frameworks such as Spring, Hibernate and Lucene in order to provide a flexible and scalable DMS solution. Thanks to the most advanced presentation technology, LogicalDOC offers an unrivaled user experience with a refined and responsive interface.
 
A rich set of APIs is available for integration with third-party applications via webservice. On the website of LogicalDOC you can also download the commercial version of the software with a set of additional features.
 
<img src="/AppImages/Article/logicaldoc-screenshot_sm.png" alt="" class="float-left">

LogicalDOC is a modern document management system with a nice interface, easy to use and very fast. It uses open source Java frameworks such as Spring, Hibernate and Lucene in order to provide a flexible and scalable DMS solution. Thanks to the most advanced presentation technology, LogicalDOC offers an unrivaled user experience with a refined and responsive interface.

LogicalDOC Document Management - DMS

SMC takes a state machine stored in a .sm file and generates a State pattern in 14 programming languages. Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions. 

SMC - The State Machine Compiler

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