CodeTrack is a free .NET profiler with some extra tricks up its sleeve.
On top of the profiling features it also allows debugging and analyzing code execution.

SequenceDiagram.org is a a free online tool to create UML sequence diagrams. It doesn't have any ads or other clutter. All processing of parsing and painting the diagram is done using javascript client side in the users web browser. This not only makes it snappy to work with, but it also means that secrets are safe if you chose to put any into the diagram. Since no backend server is used it is also possible to use the web application offline. This makes it nicer to work with compared to the other alternatives out there. This is also the only sequence diagram tools which allows you to:
* Script using a simple text notation when it is most convenient to do so, and
* Interact using you mouse to draw arrows or create notes when that is most convenient.

ReqView is a hosted requirements management tool with which you can easily create structured requirements documents and collaborate on document review in your team.

zipBoard is a bug tracking and visual feedback tool which lets product developers work collaboratively on their web-based (web-apps, websites and E-learning) products. You can either use zipBoard while you build new product or improve the existing ones with the help of collective visual feedback and task management. All the stakeholders get real time updates during the whole process which makes it a productive and fun experience.

generjee is a free online tool to create comprehensive data-oriented Java EE applications without any coding. You can use it to start development projects from a prepared code base, tailored according to your specific project settings and your individual data model. The produced code is ready to run on any Java EE application server and is independent of generjee. Generated technology stack: Java EE 7, JSF 2.2, PrimeFaces 5.3, Hibernate, CDI, Apache Shiro, Apache Maven.

PyCharm is an Integrated Development Environment (IDE) used for programming in Python. It provides code analysis, a graphical debugger, an integrated unit tester, integration with version control systems (VCSes), and supports web development with Django.

GC easy is a free universal Garbage Collection log analyzer

stMator is fast project time estimation tool, Start from here and then you can export your tasks to Asana, Assembla, Jira or in PDF format and email to clients.

Octopus Deploy is a friendly deployment automation tool for .NET developers. Octopus works with your build server to enable reliable, secure, automated releases of ASP.NET applications and Windows Services into test, staging and production environments, whether they are in the cloud or on-premise

IntelliJ IDEA is focused on raising your productivity by providing instant and clever code completion, on-the-fly code analysis, easy project navigation and reliable refactorings.