LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Optimizer for Eclipse - Optimizer for Eclipse is a free plugin that finds and fixes common configuration issues.
draw.io - Online diagramming application
Log4E - Log4E is an Eclipse Plugin which helps you to use your logger easily in Java Projects.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Eclipse Subversive - Subversive integrates Subversion (SVN) version control system with the Eclipse platform.