I have two extension ideas which I don't have time to implement nor do I currently have the skill to implement.
1) Favorites or bookmarks - You can follow threads now, but it would be great to have an area within Flarum where each user could have a list of their favorite threads.
2) Custom editor button/menu for any extra bbcode/markdown you want - This has been discussed here, but I think more around just adding a couple extra buttons like maybe a font color button. But, what I'm talking about here is a button you push, a pop up menu appears, and you can select any bbcode/markdown which the admin sets in the backend. So, if your forum is using a custom bbcode, in the backend you could input the tag. Then in the frontend, when I user chooses that from this menu, it would paste in at least a shell of that bbcode. The user would still need to fill things in of course, but they'd instantly have the basic code.
