Some standalone apps are already added to the page, but it would be best to approach this subject in a solid reusable fashion.
Some sort of a system for different tools helpful for music games preview or display. I was giving it thought, and can put together something quickly (think the first draft may arrive live on this weekend). If you could have such a g4m subsite to use, would you find some features especially helpful?
So far I have in mind different sets of dice to bring up on screen, meeples, tokens and small piano keyboard input.
This will let you randomize notes and numbers in different ranges.
The workframe will hopefully be easily extendable. Importing assets as for game boards and cards decks from our other content to the "virtual tabletop" should be within reach.
I'm settling for an inefficient-but-easy coding approach with jQuery.UI — if anyone would like to help with that side of things, let's coordinate the efforts. Code will be here with the free license.
EDIT: first version here: http://musicgames.wdfiles.com/local--html/app%3Ahub/9759cddd39059df29890fc0f5cc490b6337d9955-1417275777453948845/musicgames.wikidot.com/