Here is a list of my favourite development tools:

<a href="http://www.jetbrains.com/teamcity/" target="_blank">TeamCity</a>

<ul>Configuration Management</ul>
<a href="https://puppetlabs.com/puppet/puppet-enterprise" target="_blank">Puppet</a>
<a href="http://cfengine.com/" target="_blank">CFEngine</a>
<a href="http://code.google.com/p/escservesconfig/" target="_blank">ESCAPE</a> - Centralised restful configuration service (open source)

<ul>Scripting Technologies</ul>
<a href="http://www.gradle.org/" target="_blank">Gradle</a>
<a href="http://buildr.apache.org/" target="_blank">Buildr</a> (Java)

<ul>Build Tools</ul>
<a href="http://ant.apache.org/ivy/" target="_blank">Ivy</a>
<a href="http://maven.apache.org/" target="_blank">Maven</a>

<ul>Production monitoring system</ul>
(which version deployed to which environment). 
For example, Nagios, OpenNMS and HP Open View.

<ul>Databases</ul>
<a href="http://www.mongodb.org/" target="_blank">MongoDB</a>

<ul>Mobile Development</ul>
<a href="http://www.sencha.com/" target="_blank">Sencha Touch</a>

<ul>Logging</ul>
<a href="http://logging.apache.org/log4net/" target="_blank">Apache Log4Net</a>
<a href="http://www.theobjectguy.com/dotnetlog/" target="_blank">.NET Logging Framework</a>




<ul>Testing Tools</ul>
High Level Tools
<a href="http://www.seleniumhq.org/" target="_blank">Selenium</a>
<a href="http://fitnesse.org/" target="_blank">Fitnesse</a>
<a href="http://www.rallydev.com/test-management" target="_blank">Rally</a> (Agile)

<ul>Refactoring</ul>
<a href="http://www.jetbrains.com/resharper/" target="_blank">Resharper</a>

SoapUI (Useful for creating mock data services)

<ul>Tools</ul>
<a href="http://www.scootersoftware.com/index.php" target="_blank">Beyond Compare</a>
<a href="http://www.xmlvalidation.com/" target="_blank">XML Validation Tool</a> (free)
<a href="http://getglimpse.com/" target="_blank">Glimpse</a>
<a href="http://www.trilead.com/Download/" target="_blank">VMX</a> Virtual Server Management
<a href="http://wixtoolset.org/" target="_blank">WIX</a>
<a href="http://fiddler2.com/" target="_blank">Fiddler</a> (HTTP debugging proxy)

Paint.NET (Graphic Editor)

Notepad++ (Text Editor)

JSON extension for Notepad++ 
 
Subversion (Version Management)
TortoiseSVN (Subversion Interface)
Pixel Ruler


<ul>UI Software</ul>
Balsamiq - Wireframing Software
Crazy Egg Confetti - Eye Tracking Software
Color Schemer

<ul>Charting libraries</ul>
AngularJS
Telerik Kendo UI
.netCharting
aCharts
Cubism.js
D3
Dojo GFX
dygraphs
Flot
Flotr
Flotr2
Google Chart Tools
gRaphaël
Highcharts
Envision.js
Javascript InfoVis Toolkit
jqPlot
jQuery Sparklines
jQuery Visualize
milkchart
RGraph
Rickshaw
Timeplot
GraphUp

