JobRunr is the ultimate library to perform background processing on the JVM. It performs fire-and-forget, delayed, scheduled and recurring jobs inside Java applications using only Java 8 lambda's. CPU and I/O intensive, long-running and short-running jobs are supported.
It can be used in various use cases like batch processing, image processing, database maintenance, daily maintenance like taking backups, sending out notifications etc. 
Its feature include:
<ul>
<li>Simple: just use Java 8 lambda's to create a background job.</li>
<li>Distributed &amp; cluster-friendly: guarantees execution by single scheduler instance using optimistic locking.</li>
<li>Persistent jobs: using either a RDMBS (four tables and a view) or a noSQL data store.</li>
<li>Embeddable: built to be embedded in existing applications.</li>
</ul>

JobRunr is the ultimate library for background processing in Java.

JobRunr - The ultimate library for background processing in Java.

BoneCP is a fast, Java database connection pool (JDBC Pool) library. Its feature include:
 <UL>
	<LI>Highly scalable, fast connection pool</LI>
	<LI>Callback (hook interceptor) mechanisms on a change of connection state</LI>
	<LI>Statement caching support</LI>
	<LI>Automatic resizing of pool</LI>
	<LI>Support for obtaining a connection asynchronously</LI>
	<LI>Easy mechanism to execute a custom statement on each newly obtained connection</LI>
	<LI>Support to switch to a new database at runtime without shutting down an application</LI>
	<LI>JMX support </LI>
	<LI>Ability to replay any failed transaction automatically </LI>
	<LI>Datasource/Hibernate support capable</LI>
	<LI>Debugging support and Hooks available</LI>
 </UL>

BoneCP is a fast, Java database connection pool (JDBC Pool) library.

BoneCP - The JDBC Connection Pool

PDFClown is a PDF library helps to generate, read and edit PDF. It helps to split and merge the PDF documents. It has support to add Images, Fonts, Barcodes, Bookmarks, Annotations, Form fields like check box, button, list box etc, Compression, text extraction. It has .NET version developed for mono. 
 
 Source forge: <A HREF="http://sourceforge.net/projects/clown/" target="_blank">http://sourceforge.net/projects/clown/</A>

PDFClown is a PDF library helps to generate, read and edit PDF. It helps to split and merge the PDF documents. It has support to add Images, Fonts, Barcodes, Bookmarks, Annotations, Form fields like checkbox, button, list box etc, Compression, text extraction.

PDFClown - PDF library

Constellio Open Source Enterprise Search is based on Apache Solr and using Google Search Appliances connectors architecture, it allows, with a single click, to find all relevant content in your organization (Web, email, ECM, CRM etc.). 

 It supports Federated search, Using the single interface data in the organization could be discovered or searched. It provides multi-lingual search. Support for more than 15 languages are available. It has support of automatic document classification, adding tags or keywords to the documents. Additional to that this product has all kind of feature a Enterprise Search engine should have. It supports reporting on indexing and search, Sort results, Synonyms search, Thesaurus support, Auto complete, Facet etc. Constellio can index SharePoint sites, Documentum, FileNet, LiveLink. 

 Google's Enterprise Connector Manager provides support to retrieve data from different sources like database, file system, CRM, Email etc. Data from database could be retrieved using <A HREF="http://code.google.com/p/google-enterprise-connector-database/" target="_blank">Database connector</A>. This product most efficiently using this and retrieves the data from different sources. It uses Apache Solr to index the content. 

 Constellio's secure web interface will allow you to search your email and access attached files. It also provides API support in Ruby, PHP, Java, Python, JSon, C#, ColdFusion. Google's Enterprise Connector used in Google Search Appliance is constantly adding more connectors to retrieve data from different sources. Since Constellio uses this more Enterprise search support will be provided.

Constellio Open Source Enterprise Search is based on Apache Solr and using Google Search Appliances connectors architecture, it allows, with a single click, to find all relevant content in your organization (Web, email, ECM, CRM etc.).

Constellio - Enterprise Search engine

SMSsync is a simple, yet powerful SMS to HTTP sync utility that turns any Android phone into a local SMS gateway by sending incoming messages(SMS) to a configured URL (web service). 

SMSSync - SMS gateway for Android powered phones

Open source examination software for conducting any type of exam including online exam, pre-screening for colleges, universities and companies. Its Key features include Questions Categories,  Question Papers,  Open Exams,  Results, Manage Users, Schedule Exam, Real-time notifications, analysis by user, exam and category with ability to download certificates.

Kaldin - Online Examination Software

A distributed &quot;no single point of failure&quot; service directory of SOA services which allow clients to easily manage(find, use, publish, monitor, deploy) their services. By using it you increase the number of hot deployments, decrease server load on your services, increase availability of your service response times by using it's internal auto load balancing mechanism. Service repository stores the information about your service. Clients will communicate the repository and fetch the information about your service and then connect using the URL. This avoids the hard coded dependencies to (web/rest)services.

A distributed &quot;no single point of failure&quot; service directory of SOA services which allow clients to easily manage(find, use, publish, monitor, deploy) their services. By using it you increase the number of hot deployments, decrease server load on your services, increase availability of your service response times by using it's internal auto load balancing mechanism.

Service Repository - Service Directory for SOA Services

Xuggler is the easy way to uncompress, modify, and re-compress any media file (or stream) from Java. It provides simple API for encoding and decoding audio and video.

Xuggler - Media Tools API in Java

A powerful open source data warehouse system. InterMine allows users to integrate diverse data sources with a minimum of effort, providing powerful web-services and an elegant web-application with minimal configuration. InterMine powers some of the largest data-warehouses in the life sciences.

Intermine - A powerful open source data warehouse system

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