JMeter is a pure Java desktop application designed to load test functional behavior and measure performance. It may be used to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). It can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types. 

 It could do performance test for Web application, Web services, Database, LDAP, JMS, Mail. It produces graphical analysis of test report. Test results could be cached offline. Data analysis and visualization plugins allow great extensibility.

JMeter is a pure Java desktop application designed to load test functional behavior and measure performance. It may be used to test performance both on static and dynamic resources (files, Servlets, Perl scripts, Java Objects, Data Bases and Queries, FTP Servers and more). It can be used to simulate a heavy load on a server, network or object to test its strength or to analyze overall performance under different load types.

JMeter - Load and Performance tester

LiveGraph is a framework for real-time data visualisation, analysis and logging. It has a real time plotter that can automatically update graphs of your data while it is still being computed by your application. LiveGraph reads files in a simple CSV-style format. For applications developed in Java, LiveGraph additionally provides an API that handles all data logging and persistency issues. LiveGraph uses only very few computational resources for the updates as it is has specialised caching techniques. Transformation of data series between Linear, logarithm, unit interval, and time-plot transformations are supported.

LiveGraph is a framework for real-time data visualisation, analysis and logging. It has a real time plotter that can automatically update graphs of your data while it is still being computed by your application. LiveGraph reads files in a simple CSV-style format. For applications developed in Java, LiveGraph additionally provides an API that handles all data logging and persistency issues.

Live Graph - Plot and explore your data in real-time

CruiseControl is both a continuous integration tool and an extensible framework for creating a custom continuous build process. It includes dozens of plugins for a variety of source controls, build technologies, and notifications schemes including email and instant messaging. A web interface provides details of the current and previous builds.
 <img src="/AppImages/Article/crusiecontrol-img1.jpg" alt="" class="float-center">

CruiseControl is both a continuous integration tool and an extensible framework for creating a custom continuous build process. It includes dozens of plugins for a variety of source controls, build technologies, and notifications schemes including email and instant messaging. A web interface provides details of the current and previous builds.

CruiseControl - Continuous Integration Tool to automate build process

GNU Octave is a high-level interpreted language, primarily intended for numerical computations. It provides capabilities for the numerical solution of linear and nonlinear problems, and for performing other numerical experiments. It also provides extensive graphics capabilities for data visualization and manipulation. Octave Forge is a place for development of its packages; from bioinformatics and fuzzy logic to mechanics and instrument control.

GNU Octave - Language for Numerical Computations

hawtio is a lightweight and modular HTML5 web console with lots of plugins for managing your Java stuff. It provides web console for Active MQ, Elastic search, Apache Camel, Apache CXF, Git, Fuse Fabric, Infinispan, Jetty, JMX, Quartz, Tomcat, Wiki, JVM, Junit and lot more. You can dynamically extend hawtio with your own plugins or automatically discover plugins inside the JVM.
 
The only server side dependency (other than the static HTML/CSS/JS/images) is the excellent Jolokia library which has small footprint (around 300Kb) and is available as a JVM agent, or comes embedded as a servlet inside the hawtio-default.war or can be deployed as an OSGi bundle.

hawtio is a lightweight and modular HTML5 web console with lots of plugins for managing your Java stuff. It provides web console for Active MQ, Elastic search, Apache Camel,  Apache CXF, Git, Fuse Fabric, Infinispan, Jetty, JMX, Quartz, Tomcat, Wiki, JVM, Junit and lot more.  You can dynamically extend hawtio with your own plugins or automatically discover plugins inside the JVM.

hawtio - A modular web console for managing your Java stuff

Jenkins is an award-winning application that monitors executions of repeated jobs, such as building a software project or jobs run by cron. It focuses on two things, Building/testing software projects continuously and Monitoring executions of externally-run jobs. Jenkins can distribute build/test loads to multiple computers. Builds can be tagged long after builds are completed. JUnit test reports can be tabulated, summarized, and displayed with history information, such as when it started breaking, etc. History trend is plotted into a graph.
 <img src="/AppImages/Article/jenkins-img1.jpg" alt="" class="float-center">

Jenkins is an award-winning application that monitors executions of repeated jobs, such as building a software project or jobs run by cron. It focuses on two things, Building/testing software projects continuously and Monitoring executions of externally-run jobs. Jenkins can distribute build/test loads to multiple computers.

Jenkins - Continuous Integration Server

Imageflow is a high-performance image manipulation for web servers. Includes imageflow_server, imageflow_tool, and libimageflow . 
 
imageflow_tool is a command-line tool for experimenting, running batch jobs, or when you want process isolation. Up to 17x faster than ImageMagick. Also produces smaller files at higher quality. imageflow_server can run JSON jobs or manipulate images in-flight (e.g./bucket/img.jpg?w=200) for direct use from HTML. Source images can reside in blob storage, on another server, or on the filesystem.

Imageflow is a high-performance image manipulation for web servers. Includes imageflow_server, imageflow_tool, and libimageflow . 

Imageflow - High-performance image manipulation for web servers

fd is a simple, fast and user-friendly alternative to find. While it does not seek to mirror all of find's powerful functionality, it provides sensible (opinionated) defaults for 80% of the use cases.
 
It supports regular expression (default) and glob-based patterns. It is very fast due to parallelized directory traversal. It ignores hidden directories and files and .gitignore by default.

fd is a simple, fast and user-friendly alternative to find. While it does not seek to mirror all of find's powerful functionality, it provides sensible (opinionated) defaults for 80% of the use cases.

fd - A simple, fast and user-friendly alternative to 'find'

MySQL Workbench is a visual database design tool. The tool is specifically for designing MySQL database. MySQL Workbench provides DBAs and developers an integrated tools for Database Design & Modeling, Query browser, Database Administration. 

 Download link: <A HREF="http://dev.mysql.com/downloads/workbench/5.0.html" target="_blank">http://dev.mysql.com/downloads/workbench/5.0.html</A>

 <img src="/AppImages/Article/workbench-article-image1.png" alt="" class="float-center">

MySQL Workbench is a visual database design tool. The tool is specifically for designing MySQL database. MySQL Workbench provides DBAs and developers an integrated tools for Database Design & Modeling, Query browser, Database Administration.

MySQL Workbench - Visual database design tool for MySQL

jFreeChart is a widely used open source charting library. Its flexible design is easy to extend and targets both server-side and client-side applications. It supports many output types, including Swing components, image files (PNG and JPEG) and vector graphics file formats (including PDF, EPS and SVG). It may not provide real time charts, updating the dataset once per second is fine. Refreshing the chart less than a second will result in high cpu load. <A HREF="http://www.ujihara.jp/jbyjsharp/jfreechart/" target="_blank">jFreeChart.NET</A> - JFreeChart ported on .NET. Demo: <A HREF="http://www.jfree.org/jfreechart/jfreechart-1.0.13-demo.jnlp" target="_blank">http://www.jfree.org/jfreechart/jfreechart-1.0.13-demo.jnlp</A>

jFreeChart is a widely used open source charting library. Its flexible design is easy to extend and targets both server-side and client-side applications. It supports many output types, including Swing components, image files (PNG and JPEG) and vector graphics file formats (including PDF, EPS and SVG).

jFreeChart - Java and .NET chart library

A command-line benchmarking tool (inspired by bench). If the program execution time is limited by disk I/O, the benchmarking results can be heavily influenced by disk caches and whether they are cold or warm.
 
Its features include: 
<ul>
<li>Statistical analysis across multiple runs.</li>
<li>Support for arbitrary shell commands.</li>
<li>Constant feedback about the benchmark progress and current estimates.</li>
<li>Warmup runs can be executed before the actual benchmark.</li>
<li>Cache-clearing commands can be set up before each timing run.</li>
<li>Statistical outlier detection to detect interference from other programs and caching effects.</li>
<li>Export results to various formats: CSV, JSON, Markdown, AsciiDoc.</li>
<li>Parameterized benchmarks (e.g. vary the number of threads).</li>
</ul>

A command-line benchmarking tool (inspired by bench). If the program execution time is limited by disk I/O, the benchmarking results can be heavily influenced by disk caches and whether they are cold or warm.

hyperfine - A command-line benchmarking tool

The Grinder is a Java load testing framework that makes it easy to run a distributed test using many load injector machines. Load test anything that has a Java API. This includes common cases such as HTTP web servers, SOAP and REST web services, and application servers (CORBA, RMI, JMS, EJBs), as well as custom protocols. 

 A graphical console allows multiple load injectors to be monitored and controlled, and provides centralised script editing and distribution. Automatic management of client connections and cookies. SSL. Proxy aware. Connection throttling. 

 The Grinder can simulate web browsers and other devices that use HTTP, and HTTPS. It can be used to test Web Service, Database, RPC, POP3, SMTP, FTP, and LDAP.

The Grinder is a Java load testing framework that makes it easy to run a distributed test using many load injector machines. Load test anything that has a Java API. This includes common cases such as HTTP web servers, SOAP and REST web services, and application servers (CORBA, RMI, JMS, EJBs), as well as custom protocols.

Grinder - Java Load Testing Framework

Openchart2 is based on the JOpenChart library. It provides a simple interface for Java programmers to create two-dimensional charts and plots. This library features an assortment of graph styles, including advanced scatter plots, bar graphs, pie charts, Radar charts, Dot plots. All chart types support dynamic zooming. Simple arrays or full database sources can provide data to the plotting routines.

Openchart2 is based on the JOpenChart library. It provides a simple interface for Java programmers to create two-dimensional charts and plots. This library features an assortment of graph styles, including advanced scatter plots, bar graphs, pie charts, Radar charts, Dot plots. All chart types support dynamic zooming. Simple arrays or full database sources can provide data to the plotting routines.

Openchart2 - Simple Plotting for Java

Zope.testbrowser provides an easy-to-use programmable web browser with special focus on testing. It is used in Zope, but it's not Zope specific, it can be used to test or otherwise interact with any web site.

Zope-Testbrowser Programmable browser for functional black-box tests

Capybara aims to simplify the process of integration testing Rack applications such as Rails, Sinatra or Merb. Capybara simulates how a real user would interact with a web application. It is agnostic about the driver running your tests and currently comes with Rack::Test and Selenium support built in. HtmlUnit and env.js are supported through external gems. 

Capybara - Acceptance test framework for web applications 

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