Plug-in to show a timer on a task form

This is not available and AFAIK it is currently not possible to add such functions by a plugin.

I see this post is older but I came across this problem recently and thought I would share my solution. So now that Appian allows for webcontent I am using a video of a stop watch. With youtube you can autoplay and set the current position of the video in seconds. Here is an example:

a!webContentField(
label: "Web Content",
labelPosition: "COLLAPSED",
source: concat(
"www.youtube-nocookie.com/.../taTfMdJn_oA
local!currentdurationinseconds,
"&controls=0&disablekb=1&fs=0&modestbranding=1&rel=0&showinfo=0&color=white"
),
height: "SHORT"
)

I didn't want the ads so I found a downloadable timer video and set up an interal site with a javascript media player.