Yahoo! Groups!

Basecamp is a web-based project collaboration tool that allows groups of people to share files, meet deadlines, assign tasks, and centralize feedback.

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.

Usenet.net has been a trusted Usenet provider since 2004 offering a choice of unlimited Usenet access accounts. Usenet.net provides high-speed premium newsgroup access using a redundant network of premium servers so that users can enjoy downloading with unlimited speed.

FreeLists provides the internet community with Free, no-hassle, high-quality mailing lists. We don't use advertisements and we don't charge for higher-than-a-certain-volume lists. That means you don't have to worry about too many people signing up, nor the amount of traffic on your list(s). FreeLists is about just getting the message across to your subscribers.

Give your team continuous time for focused workWinio is an organized and flexible space for teams that combines documents, tasks, and discussions to empower transparent collaboration in a peaceful way.

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

Accounting systems are built for accountants and they are great for filing a year-end but they suck at running a day-to-day consulting company where every hour has value. An intelligent project accounting application like GroupThinq, provides a much higher level of detail on every detail of your company, in real-time, to help your teams run projects, to connect teams across organizational silos, and to make plainly visible the value of how time is being spent for every member of the team. GroupThinq’s intelligent assistant makes everyone smarter, more motivated and more accountable for their time and it helps business owners (who often are not trained in business) understand every detail of their company using the power of a super smart AI assistant. »

Email and web based discussion group software, includes archiving, emails, wiki, polls, file repository and a 'database' - essentially a functional and modern reboot of Yahoo! Groups. also allows for external integration with software like Slack.

WordPress mailing group is a plugin that allows you to run a free Listserv or email group just like Google Groups or Yahoo Groups right from your WordPress dashboard. Group members can use their favorite email clients to interact with the group, no need to login to dashboard. They can send plain/text or HTML emails with attachments. The plugin offers various email sending options and also allows to add an SMTP server for outgoing emails.