Would it be possible to create custom control for MultiSelectOptionSet? Something like the existing one for standard optionset, but we would need it for multiselect.

In the SharePoint Documents Tab, see all folders and sub-folders in a hierarchical "tree" view, instead of first having to click in a folder to then be able to see its subfolders, but see everything at once toggled down.

Stakeholder map as inspired by common stakeholder management methodology. The chart would display related records to accounts featuring three fields formatted as numbers (typically 1 - 10) to plot the stakeholder on the map. 
Ideally the map would feature sections (with customizable labels) to indicate the strategy to pursue for the stakeholder. 

Would love to work with motivated contributors in this one. 

focus more with chart with more analytics tools.

Agents often want to quickly see how much time they still have left for a break, for example.
It would be great to have a clock always visible to show that

For example auto-increment field on contacts that holds order of each contact related to the same parent account, like the line order field on purchase order  product table in field service module that holds the order of each product related to this purchase order

The ability to merge two records from an MDA table view. I am creating an MDA for help desk tickets, and want to be able to merge multiple duplicate tickets together.

A text input for canvas apps that has a "Google-Like" autosuggestion feel to it. 

The control can look up a field of data in a DB and render suggestions based on passed search queries.

Many of these are quite old, it would help to sort by last updated date