draw.io - Online diagramming application
SmartFocus - SmartFocus empowers you to deliver omnichannel marketing campaigns with true personalization.
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.
AdCurve - AdCurve is an online campaign management platform for retailers.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Powermailer - Bulk Email Marketing Service in India by PowerMailer helps you to design email newsletters, Schedule your Email Campaigns, Track Email Campaigns