Open Source Scalable Vector Graphics Editor without installation.
Download Portable Inkscape 32-64 Online (0.5 MB) 31/01/15
In first screen enter: 0.91-1
Online installer will download Inkscape-0.91-1-win32.7z and/or Inkscape-0.91-1-win64.7z but use them if found in its folder.
Download Portable Inkscape Online (0.4 MB) 23/12/12
In first screen enter: 0.48.5-1
Extract and run InkscapePortable.
Settings of installed Inkscape should be preserved.