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   * [userforge.com](https://userforge.com/) - Interconnected online personas, user stories and context mapping.  Helps keep design and dev in sync, free for up to 3 personas and 2 collaborators.
   * [wistia.com](https://wistia.com/) — Video hosting with viewer analytics, HD video delivery and marketing tools to help understand your visitors, 25 videos and Wistia branded player
   * [wormhol.org](https://www.wormhol.org/) — Straightforward file sharing service. Share unlimited files up to 5GB to as many peers as you want.
-  * [yammer.com](https://www.yammer.com/) — Private social network standalone or for MS Office 365. Free with a bit less admin tools and user management features
   * [zoom.us](https://zoom.us/) — Secure Video and Web conferencing, add-ons available. Free limited to 40 minutes
   * [Zulip](https://zulip.com/) — Real-time chat with unique email-like threading model. Free plan includes 10,000 messages of search history and File storage up to 5 GB. also it provides self-hostable open-source version.