Free graphic and photo viewer without installation.
Download Portable XnViewMP 32-64 Online (0.3 MB) 22/01/14
Download Portable XnView Full Online (0.3 MB) 17/03/15
Download Portable XnView Standard Online (0.3 MB) 23/12/12
Extract and run XnViewMPPortable or XnViewPortable.
Edit XnViewMPPortable.ini to set Cache:
Cache=Temp Cache set in Windows Temp folder deleted when leaving
Cache=Portable Cache set in Data
Settings of installed XnView should be preserved.