@Toby has plans to create a "marketplace" for Flarum extensions. He hasn't said yet whether he intends to make the marketplace itself available as an extension (as far as I know, it may not even be done as an extension; it's still way down the road) but I'm sure he'd be willing to at least think about the possibility.
Please note that the "Extensions" tag is for discussion and support of extensions that have been released. To post requests and ideas for new extensions, you can use the "Features" tag, as described in the FAQ. Thank you!
