Octave 4.0.0 is the current stable release. The source distribution as well as a Windows binary installer are available for download.
OctConf 2015 will take place in Darmstadt, Germany, from September 21 to September 23, 2015.
For details on previous conferences, see Category:OctConf.
Summer of Code
Octave is again participating in both the Google Summer of Code and the ESA Summer of Code in Space in 2015. See Summer of Code for more details on this year's participants and their projects.