pdf-navigation: A 2,515-page PDF: page, jump to CPUID, search, step hits.
image-pane: Right-click an image's name, even in a shell, to open it.
pdf-tint-fit: PdfTint tints the page, PdfFit fits it, a page address jumps.
text-is-the-interface: Middle-click make in the README; right-click the error.
terminals-are-panes: A terminal is a pane: Ctrl-b, then move over its output.
scripting-over-9p: A script drives the session through its virtual filesystem (9P).
diff-review: Right-click a diff line to open that line of the file.
chords: Hold left, click middle to cut; click right to paste.
columns: Newcol adds a column; a look opens there; Alt-c moves a pane.
search: Grep lists the hits; n and N walk them; right-click opens one.
where-commands-run: A file's tag runs in its directory; the column tag, in the session's.
edit-via-ctl: An Edit written to ctl changes every sum; one Undo restores.
wait-editor: git commit's message opens in a pane; Del returns it to git.