FYI. PDF-XChange Editor Portable 7.0.323.2 (PDF editor and viewer) Released for the PA Platform, courtesy of PortableApps.com.
I like STDU Viewer. Small, quick, suitable for *.pdf, *.djvu, *.tif, *.fb2, *.epub, *.mobi vieweing. All in one.
PDF-XChange Editor Portable 7.0.324 (PDF editor and viewer) Released (February 2, 2018) (PortableApps.com)
PDF-XChange Editor Portable 7.0.324.2 (PDF editor and viewer) Released (February 15, 2018) (PortableApps.com)
FYI. PDF-XChange Editor Portable 7.0.324.3 (PDF editor and viewer) Released for the PA Platform, courtesy of PortableApps.com.
W.10 Online Chrome protected by WDEG and OSA Offline SumatraPDF Portable - I changed I.L. to "Low" value - Protected by WDEG and OSA.
qpdfview. If YACReader was not so slow starting up I would use it for pdf too (now use it only for comic files)
Foxit Reader Portable 9.2.0.9297 (PDF reader and creator) Released (July 28, 2018) (PortableApps.com) PDF-XChange Editor Portable 7.0.326.1 (PDF editor and viewer) Released July 29, 2018) (PortableApps.com) PDF-XChange Viewer Portable 2.5.322.9 (PDF viewer) Released (July 29, 2018) (PortableApps.com)