I just came across Rebol through the Odroid Magazine (February 2014) and it looks very interesting. Relatively young, designed to simplify client/server programming and handle both data and metadata together which they describe as something akin to XML being executable, and being touted for the “X Internet” (eXecutable Internet) - see Why Rebol?
Open Source License
It began with commercial versions and restrictive license, but was released as open source in Devember 2012 (under the Apache 2.0 license) so like SAFE, being handed over to the community which is working towards Rebol 3).
Let me know what you think and if you think it looks worth investigating and maybe building something. My first thought is how it might help people build web-like-apps on SAFE, but to be honest even a “Hello Safecoin balance” could go viral
This isn’t a project, but I’m not sure if there’s a more suitable category.