Here's CopyQ, a Qt based, multi-platform (Windows, MacOS, and Linux), OSS offering that appears to be portable on Windows (stealth status unchecked!) -- settings from the zip version are kept in a 'config' sub-folder (FreewareFiles.com also lists a prior version as portable, cf. www.freewarefiles.com/CopyQ-Portable_program_88209.html).
http://hluk.github.io/CopyQ/ wrote:CopyQ is [a] clipboard manager with searchable and editable history.
Check the homepage at http://hluk.github.io/CopyQ/ for more info. CopyQ current Windows version (v2.1.0) can be downloaded from Sourceforge, at http://sourceforge.net/projects/copyq/ ("Browse all files" and download the zipped package).