J2ME
Software / App
A mobile platform from the past, mentioned as an example of the fragmented and unstable development environment before the iPhone's ecosystem matured.
Mentioned in 2 videos
Videos Mentioning J2ME

There's an Art to Getting Brilliant People to Surprise Themselves - Kevin Slavin of The Shed
Y Combinator
Mentioned as a difficult platform for developing games in the early days of mobile.

Apple Vision Pro: Startup Platform Of The Future?
Y Combinator
A mobile platform from the past, mentioned as an example of the fragmented and unstable development environment before the iPhone's ecosystem matured.