Most of the DAW interfaces often seem overcomplicated, and they only tend to get more and more bloated over time. Many of them are commercial, proprietary-licensed and almost none of them support all major operating systems at the same time.

Helio is an attempt to rethink a music sequencer to create a tool that feels right.

It aims to be a modern music creation software, featuring linear-based/pattern-based sequencer with clean UI, integrated version control for synchronizing project between devices, microtonal temperaments support, small portable builds and more; mainly targeted at hobbyist composers, game developers and indie artists.

Blackle Mori's online drumkit databender. Play around with the settings until you come up with a sample or pattern that you like and play it. Works a little bit like a tracker in that you can build pretty complex patterns - not just drum lines, probably entire songs.

OpenPCR is a fully functional yet affordable ($599us) PCR (polymerase chain reaction) device, used for replicating DNA for the purposes of sequencing or barcoding (species determination). The whole kit - from the software to the hardware itself - is open source, so you can download the code, CAD, and Eagle files and build your own if you don't want to buy a kit.