Crossfilter - Fast multidimensional filtering for coordinated views
asciiflow - Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
Diagrammm - Fundamentals on data visualization
PabloDraw - PabloDraw is an Ansi/Ascii text and RIPscrip vector graphic art editor/viewer with multi-user capabilities.
BestShot - Your AI-based tennis coach
JavE - JavE (Java Ascii Versatile Editor) is a free Ascii Editor.