QT9 Quality Management - User friendly one stop shop quality management software
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.
FieldPulse - All-in-one field service management solution
draw.io - Online diagramming application
Hotello - Hotello is a SAAS cloud or on premise hospitality management software that manage establishment's day to day operations and customer service.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.