Download portable Opera 27.0.1689.66 & 12.17.1863 32-64 bit Multilingual

Fast and free Web browser without installation.
Download Portable Opera Developer Online (0.5 MB) 05/09/14
In first screen enter: 28.0.1750.11
Download Portable Opera Online (0.5 MB) 06/05/14
In first screen enter: 27.0.1689.66
Download Portable Opera 12 32-64 bit Online (0.5 MB) 25/10/13
In first screen enter: 1217
Download Portable Opera Mail Online (0.5 MB) 02/07/13
In first screen enter: 1.0-1040

OperaPassView Recover the passwords stored in Opera 12 Web browser.
Download Portable OperaPassView latest Online (0.5 MB) 13/07/13

Flash Plugin

Can use Java Runtime Environment Portable

Extract and run OperaDeveloperPortable or OperaBetaPortable or OperaChromePortable or OperaPortable (each have their own profile) or OperaMailPortable.