Free Remote Control, Remote Access & Online Meetings without installation.
Download Portable TeamViewer Multilingual Online (0.7 MB) 01/12/16
Free license but nag of the end removed.
Portable TeamViewer QuickSupport Multilingual Online (0.6 MB) 11/03/16
Connect to a remote computer on startup with:
AdditionalParameters= -i 123456789 --Password pwd in TeamViewerPortable.ini
Settings of installed TeamViewer should be preserved.