Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Planetary - Decentralized social media by and for the people.
AppsGeyser - Appsgeyser is the easiest to use DIY native mobile app creation platform.
Zyl - AI-powered photo app with a privacy by design approach
MySocialApp - Seamless Social Networking features for your app
Mastodon - Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome!