Régis Grison

This plugin is made mainly for french associations, because of the french 1901 law. Feel free to contact me if you think your contry have the same kind of need and I should make some adjustments for it. 
This plugin allow to handle association members by customizing the registration fields to avoid needing an additional listing. It also allows to keep track of the subscriptions. 
Note: This plugin will make use of the ACF (Advanced Custom Fields) plugin and will also contact my server to check for news about add-ons.

Law 1901 association

Handles members of an association and their subscriptions. Mainly for french associations under 1901 law.

maymay

Augment your BuddyPress sign-up form with your social network’s registered <a href="https://codex.buddypress.org/developer/member-types/" rel="nofollow ugc">Member Types</a>. This allows new users to self-select one or more Member Types for themselves when they register for your site. You choose which Member Types you want to allow people to register with when they fill in your signup form.
<ul>
<li>Works with all BuddyPress member types registered by other plugins and themes.</li>
<li>Seamlessly integrates with the BuddyPress registration form and administration screens.</li>
</ul>
Donations for this plugin make up a chunk of my income. If you continue to enjoy this plugin, please consider <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=TJLPJYXHSRBEE&lc=US&item_name=BP%20Signup%20Member%20Type&item_number=bp-signup-member-type&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donate_SM%2egif%3aNonHosted" rel="nofollow ugc">making a donation</a>. 🙂 Thank you for your support!
Once installed, simply access your main BuddyPress options (WordPress Dashboard → Settings → BuddyPress → Options → Main Settings) and you’ll see several member type options for you to configure.

BP Signup Member Type

Does not work

Add a "Member Type" option to the BuddyPress registration form.

Law 1901 association vs BP Signup Member Type