GroupServer!

Google Groups is all about helping users connect with people, access information, and communicate effectively over email and on the web. Now theres a new version on the block. We didnt want to say it, but yes, its new and improved.

Mailman is integrated with the web, making it easy for users to manage their accounts and for list owners to administer their lists. Mailman supports built-in archiving, automatic bounce processing.

Fleep is a messenger for your teams and projects. It enables communication within and across organizations - be it your team chats, project communication or 1:1 conversations.

Sympa is an open source (GNU GPL) mailing list management (MLM) software. Its name is an acronym for Systeme de Multi-Postage Automatique (i.e. Automatic Mailing System), and also means "nice" in French.

Zoho Campaigns is an email marketing automation software that helps you deliver the right message to your audience at the right time. With Zoho Campaigns, you can easily create an email campaign, send it to your recipients, share it on social media, and track the overall performance of your campaigns. The software also lets you set workflows and create a series of emails to keep your subscribers engaged.

Create beautiful discussion lists that work with email and the web. Manage multiple groups and privacy, on a site for your organization.

Create a free embeddable forum, mailing list, photo gallery, news and blog. All apps are fully customizable, simple, instant setup, choose different formats and skins! Add your free forum or any other hosted application to your website quick and easy!

The Swift Mailing Lists are a fantastic resource. However, accessing the information in a convenient way is difficult: The web archive is not easy to navigate, and when you subscribe to a list you're bound to the UI of a mailing list. Even worse, you can't see any messages posted before you subscribed.