Daniel Westermann-Clark

By default, WordPress network usernames cannot contain anything but lowercase letters and numbers. This plugin adds network options to let you include hyphens, underscores, or uppercase letters, if desired.
Furthermore, this plugin gives you the option to allow email addresses as usernames, or to allow all-numeric usernames (e.g. “1234”).
Finally, this plugin lets you override the minimum length for usernames (which defaults to four characters).
To follow updates to this plugin, visit:
https://danieltwc.com/
For help with this version, visit:
https://danieltwc.com/2011/network-username-restrictions-override-1-0/

Network Username Restrictions Override

Does what it says!

Override restrictions on WordPress network usernames.

Damian

Based on crashutah, apeatling https://wordpress.org/plugins/bp-disable-activation/ Disables the activation email and automatically activates new users in BuddyPress under a standard WP install and WPMU (multisite). Also, automatically logs in the new user since the account is already active.
Basically i updated the plugin and added some features like:
-Option to turn off automatic login 
-Redirect options after account creation
Known Bugs: 
-Doesn’t do the automatic login if you allow blog creation during the user creation in WPMU (multisite)
<h4>Install Multiple plugins at once with WpFavs</h4>
Bulk plugin installation tool, import WP favorites and create your own lists (<a href="https://wordpress.org/extend/plugins/wpfavs/" rel="ugc">https://wordpress.org/extend/plugins/wpfavs/</a>)
<h4>Increase your twitter followers</h4>
Increase your Twitter followers with Twitter likebox Plugin (<a href="https://wordpress.org/extend/plugins/twitter-like-box-reloaded/" rel="ugc">https://wordpress.org/extend/plugins/twitter-like-box-reloaded/</a>)
<h4>WordPress Social Invitations</h4>
Enhance your site by letting your users send Social Invitations (<a href="http://wp.timersys.com/wordpress-social-invitations/?utm_source=social-popup&utm_medium=readme" rel="nofollow ugc">http://wp.timersys.com/wordpress-social-invitations/</a>)

BP Disable Activation Reloaded

The plugin is still working. It would better if you work on autologin after register

Still Working

Based on crashutah, apeatling plugin Disables the activation email and automatically activates new users in BuddyPress under a standard WP install and …

Network Username Restrictions Override vs BP Disable Activation Reloaded