Not portable
Untested
- Fotor (the old version)
- Collagerator - photo collage tool - (Mac and Windows) - some of their other projects from this developer list portable versions but not this one. However from what I'm seeing in the provided howto this might qualify as portable or at least "no install"
https://www.mediahuman.com/download.html
https://www.softpedia.com/get/Multimedi ... ator.shtml