AppMockUp - Create the most compelling screenshots for your app.
JustRecruit.co - Easy to use, low-cost recruitment software and websites, perfect for start-ups, small and growing recruitment businesses
Talview - Hiring Automation and assessment suite of applications , for multifaceted automated hiring
draw.io - Online diagramming application
Odro - Video interview and candidate selection for recruiters
yEd - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.