Although io.js has re-merged with Node.js as part of the Node.js Foundation, it has recently released a third version of its breakaway version of Node.js.
The next version of the combined node.js/io.js project, expected in October, will have version number 4.0 and the first LTS (long term support) release will be v4.1.4.
Unhappy at the way that Node's official sponsor Joyent, exercised control over the development process in a way that was perceived to be too slow, a group of its contributors forked the project at the end of 2014, creating io.js.
With the help of the Linux Foundation, Joyent established the Node.js Foundation with an open, technical governance structure. It has a Technical Steering Committee to oversee working group projects and manage contributions to the code base , a Board of Directors to guide buinsess decisions with both corporate and individual members.
Back in June, when we announced Node.js Foundation Heals Rift we reported:
A major release of Node.js that will merge the two code bases is expected within a few weeks.
Instead the major release that has appeared is on the forked branch as io.js 3.0.0, even though the project on GitHub is now already combined.
io.js adopted semantic versioning and the breaking change that required a jump from Version 2.5 to 3.0.0 is due to changes in V8 which made it necessary to reimplement
Buffer on top of V8's
The other notable changes are documented in io.js ChangeLog .
Up until now node.js hadn't adopted semantic versioning, but the forthcoming release, which will signal the merging of the io.js code base into node.js will use semver. Node.js, which will be continue on from io.js 3.x will therefore go from node.js 0.12.7 to node.js 4.x..