Here are the top 3 alternatives to Mobypicture (which was known for cross-posting photos/videos to multiple social networks at once):

1.IFTTT (If This Then That)

• The most powerful direct replacement. You can create "applets" that automatically share new photos/videos from one platform (e.g., Dropbox, Instagram, RSS) to Twitter, Facebook, LinkedIn, WordPress, etc. Far more flexible than Mobypicture ever was.

2.Zapier

• Similar to IFTTT but with advanced multi-step workflows. Excellent for businesses or power users. You can trigger cross-posting from Google Photos, YouTube, Twitter, or even email attachments to dozens of other social media platforms.

3.Buffer

• While Buffer focuses on scheduling, you can manually or automatically post photos/videos to Instagram, Facebook, Twitter, LinkedIn, and TikTok from one dashboard. It lacks true automatic cross-posting based on a trigger, but is the most stable and user-friendly alternative for planned content sharing.

Honorable mentions: Hootsuite, Dlvr.it, and Push.fm (if you want closer to "one-click to multiple networks").