TextSTAT - TextSTAT is a simple programme for the analysis of texts.
draw.io - Online diagramming application
Voyant Tools - Voyant Tools is a web-based reading and analysis environment for digital texts.
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.
NVivo - Buy NVivo now for flexible solutions to meet your specific research and data analysis needs.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.