ns-ui / sheet-ascii-range

Shipment logdrag or shift+arrow to select
W1
W2
W3
W4
W5
W6
W7
W8
MON
TUE
WED
THU
FRI
SAT
n=0 — click a cell or drag a range

Drag across cells, or focus one and Shift+Arrow to extend. The border draws itself in box-drawing glyphs and the status bar recomputes live.