Simon Wheatley

!!THIS PLUGIN IS BETA, PLEASE LET ME KNOW ANY ISSUES!!
This plugin requires PHP5 (see Other Notes > PHP4 for more).
Allows you to upload a CSV file of names, emails and usernames to invite a lot of people to join your blog.
Plugin initially produced on behalf of <a href="http://www.getambition.com/" rel="nofollow ugc">Ambition</a> a project to help UK Arts Organisations work with IT and digital media.
Is this plugin lacking a feature you want? I’m happy to accept offers of feature sponsorship: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a> and we can discuss your ideas.
Any issues: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a>.
<h3>PHP4</h3>
Many of my plugin now require at least PHP5. I know that WordPress officially supports PHP4, but I don’t. PHP4 is a mess and makes coding a lot less efficient, and when you’re releasing stuff for free these things matter. PHP5 has been out for several years now and is fully production ready, as well as being naturally more secure and performant.
If you’re still running PHP4, I strongly suggest you talk to your hosting company about upgrading your servers. All reputable hosting companies should offer PHP5 as well as PHP4.
Right, that’s it. Grump over. 😉

Invite en Masse

Allows you to upload a CSV file of names, emails and usernames to invite a lot of people to join your blog.

rtCamp

Jignesh Nakrani

With this plugin, you can send auto slack invitation via email to user who submitted a gravity form. 
This plugin works with Gravity form only. Once you have created a gravity form and do required settings, this plugin will start working. Whenever new entries are submitted via gravity form, the respective user will receive an email with slack channel invitation link.
<h4>Requirement</h4>
<ol>
<li>Gravity Form plugin.</li>
<li>Slack Team Name.</li>
<li>Slack Authentication Token.</li>
</ol>
<h4>How this plugin works</h4>
<ol>
<li>Set the “Team Name” and slack authentication token under Gravity Form -> Settings -> Slack Invite.</li>
<li>Now, create a gravity form, go to Form Setting -> Slack Invite and click on “Create one” link to set an email field.</li>
<li>Once the user submit a gravity form, he/she will receive a slack invite via email notification.</li>
</ol>
Example: Let say you have a slack team group, in which you want users to come up and chat/discuss. However, you don’t know to whom you want to invite. 
So in this case, just create a gravity form with some fields and make it public on your website. Interested members will submit that form and they will automatically receives invitation email.
Note: Your Gravity Form must have an email field.
Development of this plugin is done on <a href="https://github.com/rtCamp/automate-slack-invite-gravityforms" rel="nofollow ugc">GitHub</a>. You can report issues and suggest features.

Automate Slack Invite Gravityforms

I hate giving bad reviews but this plugin just doesn't work. I've submitted three separate issues on the support forum and still no reply after more than 3 months.

Doesn't work

With this plugin, you can send auto slack invitation via email to user who submitted a gravity form.

Invite en Masse vs Automate Slack Invite Gravityforms