I will make any extension

SEO extension (create this after a user points system is created)

1. schema.org header for forum thread[1] (and less importantly, open graph, twitter cards and ???)
   -- Should include a "star rating" of some sort using the following markup, but ignoring the price. This is dependent on a thread / comment value extension.

     <div itemprop="aggregateRating"
       itemscope itemtype="http://schema.org/AggregateRating">
      Rated <span itemprop="ratingValue">3.5</span>/5
      based on <span itemprop="reviewCount">11</span> customer reviews
     </div>
     <div itemprop="offers" itemscope itemtype="http://schema.org/Offer">
       <!--price is 1000, a number, with locale-specific thousands separator
       and decimal mark, and the $ character is marked up with the
       machine-readable code "USD" -->
       <span itemprop="priceCurrency" content="USD">$</span><span
             itemprop="price" content="1000.00">1,000.00</span>
       <link itemprop="availability" href="http://schema.org/InStock" />In stock
     </div>

2. Best Answer in first post
   -- I know this might not seem like an important seo tactic, but it is. Basically, if the first post or thread title contains a succinct question, and the best answer is included as a part of the first post, the page itself will be MUCH (orders of magnitude) more likely to be featured in the "Google Answer Box"[2]

3. A Glossary Tool (I haven't totally lost it... this is good!)
   -- Every forum is about some idea. Maybe a video game, or a type of cooking, or (in this case) the development of forum software. That idea (or domain as it is called in UML, etc) has its own vocabulary. Often the vocabulary develops and changes aver time, and sometimes it is very arcane (science, medicine, law, software). One of the best SEO tools any site can build is an interactive vocabulary or glossary.
   A fourm member will create a post like, "What does Single Sign On mean?" and tag the post with "glossary:single-sign-on" and "glossary:SSO", and of course make an accurate, readable definition.
   Then the SEO / crosslinking extension will scan whatever thread is being displayed for glossary terms (and cache it probably). A subtle "glossary" link (which click-expands to a set of links to glossary pages) will be displayed somewhere on the thread view page . The glossary term threads end with a list of threads-by-relevance that contain the glossary term.
   There is nothing a site can do for overall SEO effect that is better than this sort of crosslinking and contextualization.
   I will try to make a mockup of this idea.

[1] https://schema.org/DiscussionForumPosting
[2] https://www.searchenginejournal.com/how-to-optimize-your-site-for-googles-answer-box/166084/

Post characterization (Rewarding great posts, and identifying bad posts...)

Post Reaction Let everyone moderate! Vanilla forums allows a reader to have a "Reaction"[1] to a post along the lines of: Promote, Off Topic, Insightful, Disagree, Agree, etc. There is a way to curate the forum based on aggregate reaction.[2] Of course if every user has access to create a reaction to every post... this in itself can lead to abuse.

Random Mod Authority Make moderation a desired privilege! Slashdot (remember the glory days of Slashdot? No? Right... I am old) used a moderation system[3] that allowed semi-random users to characterize a post as Offtopic, Troll, Redundant, Insightful, etc. If a post got enough "troll" clicks, it became less visible, if it got a lot of "insightful" clicks, it became more visible, etc. By making the ability to characterize a post somewhat random, they avoided common "rep my friends, dis my enemies" type abuse.

Earned Moderation Authority Another way of making moderation a privilege. Stack Overflow and of course Discourse (same devs) use a more complex system of Increased User Reputation = Increased Moderation Power. This has its own weaknesses as the appeal of moderation power is high to certain people and low to others. It does, however, have wonderful spam mitigation side effect: its just too much work to spam.

[1] http://docs.vanillaforums.com/help/reputation/reactions/adding-and-editing-reactions/
[2] http://docs.vanillaforums.com/help/reputation/reactions/curating-with-reactions/
[3] https://slashdot.org/faq/metamod.shtml

Demon eh.. what? Think you mean Kyrne. Im still not sure what you want made.

Oh I see, the user's online mockup. Sorry breh, I'm not that advanced in extension building. I like the idea though.

i think flarum need push notification like discourse does.
it will increase user engagement as well

I would love to see an extension that lets you connect your Patreon account with Flarum to give people rewards for specific donation tiers like badges or give access to certain areas of the forum. Maybe also give an option to directly login with your Patreon account.

Patreon gets more popular every day, but I'm not sure if it's still too niche.

@Kyrne more ideas to extensions that i miss when manage my community:

• Whitelist some domains to remove nofollow attribute. It is good for SEO to help our whitelisted domains.
• Sometimes i write large posts and i miss an option to save the post as draft until publish it when it is finishes.

My aproach to solve the drafts issue is publish the post and then delete it (its visibility remains hidden until you delete forever or restore it). When i finish write the full post i restore it. This do the trick, but the problem is the date, because when i post it, it keeps the original creation date and seems an old post.

Not sure if it already exists but somehow i want to change the default sorting when being on the homepage of a flarum forum. Now it's always "latest"- Would be useful if there's an extension for this (or setting)

AngelAvila we don't allow our users to use certain email providers when registering and don't want them changing their emails to these once registered. @Ralkage @Kyrne any chance of these?

Updated to bane
3. Tip Author Extension
A plugin that will allow users to receive/give tips.
Settings:
Who can tip? - Select which groups will be able to tip other users
Who can receive tips? - Select which groups will be able to receive tips from other users

(maybe putting the button nicer and noticeable by making a green box around it and next to the tip button a dollar sign)
How to set up the tips:
• Create a PayPal.me link, then copy & paste the link in the box in the user profile settings when clicking on Tips. Or create a PayPal donation button, then copy & paste the link in the box.