This morning I wrote and published article about writing an image container class for Java which supports efficient use of Streams. It is on my local home page under Pixels - Java Images, Streams.
Although there is much said of it, there is still quite a bit unsaid about how many wrong-footed experiments it took to accomplish the seemingly obvious final result. The code itself is now (or will be) part of an unpublished library I apparently started writing just over 12 months ago for reasons I can no longer recall. It doesn't have enough guts to make publishing it worthwhile as yet.
I'm also still playing with fft code and toying with some human-computer-interaction ideas.