This greasemonkey script enhances the Tuleap Agile Dashboard by stacking cards in the «Done» column of the cardwall. Click on the cell and the cards become unstacked.

stack_done_cards.user.js

// ==UserScript==
// @name        stack done cards
// @namespace   tuleap
// @description Automatically stacks cards which are on the column «done» of the cardwall (Tuleap Agile Dashboard)
// @include     https://tuleap.net/plugins/agiledashboard/*
// @version     1
// @require     http://tuleap.net/scripts/prototype/prototype.js
// @grant       none
// ==/UserScript==

var columns_to_stack = ['Done', 'Functional Review', 'Code Review']

function addCss(cssString) {
  var head = document.getElementsByTagName('head')[0];
  var newCss = document.createElement('style');
  newCss.type = "text/css";
  newCss.innerHTML = cssString;
  head.appendChild(newCss);
}
addCss (' \
.cardwall_stacked { \
  overflow: hidden; \
  padding-bottom: 1em; \
} \
.cardwall_stacked > ul { \
    background: red; \
    position: relative; \
} \
.cardwall_stacked > ul > .cardwall_board_postit { \
    position: absolute !important; \
    top: 10px; \
} \
.cardwall_stacked > ul > .cardwall_board_postit:nth-child(1) { \
    top: 0px; \
    transform:rotate(-0.5deg); \
} \
.cardwall_stacked > ul > .cardwall_board_postit:nth-child(2) { \
    top: 5px; \
    transform:rotate(0.5deg); \
}');
var columns_to_stack_index = $$('.cardwall_board th').collect(function (th) {
    if (columns_to_stack.find(function (one) one == th.textContent)) {
        return th.cellIndex
    }
}).compact()

$$('.cardwall > tr > td').each(function (td) {
  // each cell can be stacked when we click on it
  td.observe('click', function (evt) {
    if (Event.element(evt) == td) {
      td.toggleClassName('cardwall_stacked')
    }
  })
  // stack cards
  if (columns_to_stack_index.find(function (index) index == td.cellIndex)) {
    td.addClassName('cardwall_stacked')
  }
})