Hack-A-Blueprint is a tool to draw house floorplans and blueprints.

A demo can be seen here.

It was made in one day by za3k as part of hack-a-day.

Features:

• Draw a house using rectangles (or polygons). Shapes automatically merge.
• Automatic grid snap
• "Erase" mode, which instead deletes rectangles (or polygons)
• Place premade icon "stickers" including: doors, windows, outlets, and common appliances.
• Add and edit text. Style with fonts and sizes.
• Pan and zoom
• Autosave
• Share a link

Feature wish list:

• Show room measurements automatically (or add measurement tool)

Credits:

• Heavy inspiration (but no graphics or code) came from the D&D map editor, dungeon scrawl.
• Icons by Creaticca Creative Agency - Flaticon as part of the "Graphic design tools" icon pack.
• Various other icons from Flaticon (sorry, I forgot!)
• Fonts
  • Permanent Marker by Font Diner. Apache license.