This is a simple Tcl/Tk program that displays a graphical stopwatch (with lap timer, optional countdown, etc.). Its last update was in 2004, but in my (admittedly little) usage I found no bugs. The only mild annoyance is that it maybe uses a bit more CPU time than necessary. Reproducible: Always
Created attachment 387608 [details] stopwatch-3.5.ebuild
Created attachment 387610 [details, diff] Fixes the shebang line of stopwatch
Created attachment 387612 [details, diff] Fixes broken links to stopwatch homepage