UNICASE is a CASE-Tool integrating models from the different development acitivities, such as requirements, use cases, UML models, schedules, bug and feature models into a unified model.

UML Designer is a graphical tool to edit and vizualize UML 2.4 models. It uses the standard UML2 metamodel provided by Eclipse Foundation.

Tuleap is a full free Open Source Suite for Application Lifecycle Management. Traditional development, Requirement Management, Agile Development, IT Service management. Tuleap makes software projects more productive, collaborative and industrialized.

TopTeam Analyst is a unique tool that provides a "complete solution" for Requirements gathering and management.
* State-of-the-art Use Case Authoring and Modeling
* Rich Requirements Capture and Management
* Powerful repository for all Requirements artifacts such as Screen Prototypes, Documents, etc.
* Advanced Traceability creation and visualization
* Integrated Issue Tracking and Change Proposal system
* Multi-user repository with a full suite of Collaboration Tools

As a web 2.0, SaaS solution that is targeted at Analysts, Developers, Testers and Managers, TOMOS provides modules for requirements management, test case authoring & test execution and defect tracking, along with a built-in methodology for each module and workflows for each role.

tinyPM is advanced, lightweight and smart tool for agile collaboration including product management, backlog, taskboard, user stories, wiki, integrations and REST API. tinyPM goes beyond software development and encourages all team members (including clients, management and stakeholders) to actively participate in all your projects.

The Thinkwise Software Factory Suite is an integrated development environment with which business software can be easily developed, tested and managed. It is even possible to automatically modernize existing software. The Thinkwise environment is particularly suitable for developing business software, such as ERP applications, research applications and apps. This type of software may consist of workflow, user interface in Windows, Web or mobile devices, application logic/services and database/data services.

TextUML Toolkit is an open-source IDE for UML that lets you create models at the same speed you write code. By adopting a textual notation, the TextUML Toolkit provides benefits you will not get elsewhere.

TestTrack RM, Seapine’s enterprise-level requirements management solution, manages the complete requirement lifecycle, including planning, workflow, traceability, review, change management, and reporting. Cross-platform TestTrack RM features a rich text editor, process automation, extensive customizability, powerful filters and reports, and comprehensive security. Impact analysis, suspect links, requirement snapshots, and centralized requirements management enable all stakeholders to stay informed of new requirements, participate in the review process, and understand the impact of changes on deliverables. Cross-platform support provides full functionality for Windows, Mac OS X, and Linux users, and enables hosting on your preferred operating system.

Test Automation is a C#-based application that manages projects, requirements, defects, test cases, test case run history, and facilitates automated testing.