Whimsical Wireframes - Lightning fast wireframing with real-time collaboration.
PabloDraw - PabloDraw is an Ansi/Ascii text and RIPscrip vector graphic art editor/viewer with multi-user capabilities.
Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.
asciiflow - Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
Userflows - Automatically generate user journeys
JavE - JavE (Java Ascii Versatile Editor) is a free Ascii Editor.