Vellum

Vellum is a PDF viewer with no toolbar, menubar, tabs or scrollbars, rendering pages with MuPDF. Several PDFs can be open in a window and switched between with keys, documents can move between windows, and saved groups reopen a set of papers at once. Navigation borrows from vim, with counts like 12G, plus a ':' command line, search, text selection, links and a dark page mode. Files are opened from a popup listing recent PDFs and the folders zoxide ranks highest that contain them, checked for PDFs in a background thread. It's built on libjump, the shared popup library also used by Dolphoxide and Vitrine.