differences between zephyr and riot.

riot seems a serious competitor of zephyr.

we should be looked into in more details. Some first impressions: - Zephyr is not brand new: based on commit history, it looks like an Intel / WindRiver product which has existed for some time, rocket os ? - Zephyr's choice of license (Apache) is surprising for something under the Linux Foundation umbrella which champions (L)GPL licences -- for example: RIOT's license, which is LGPLv2.1. - Zephyr supports few boards, and does not seem to target smaller hardware based on 8bit, 16bit, or lower-end 32bit (for instance Cortex M0). On the contrary, RIOT supports all of these, as well as bigger 32bit hardware (Cortex M3, M4, x86) - Zephyr seems to impose a mode of operation with a single thread when there is not plenty of memory, contrary to RIOT. - Zephyr seems to be using Contiki's network stack, which in our opinion is suboptimal. This week some RIOTers have a booth at Embedded World in Nuremberg, where Zephyr also has a booth + talk. Maybe we get some more info at this occasion. If you (or anyone else) have more infos, impressions or opinions, please share!