I'm trying my hands by announcing my first plugin, CellToolTips, here. It's a small plugin for the GridPanel to add different tooltips to individual rows of a grid. Each column tooltip has its own XTemplate that is dynamically filled from the underlying data record.
The 'magic' behind the plugin is that only a single ToolTip is created for the whole grid, making it quite memory friendly.
Note: to work in Ext 2, it needs Animal's triggerElement override for the ToolTip.
The source can be found here.
A demo is here.
Let me know what you think.