On Windows, we can build with most flavours of visual studio, but I reccomend visual studio 2013 express as it is small and free
The src/examples directories contain .sln files which you can click on.
If this does not work with your version of visual studio, click on the .vcprojx file and it will create a solution.
You can then build with ctrl-shift-B and run with F5.
There are some xcode projects, although they are not as well supported
On all platforms there is Makefile support. We reccomend unxutils from sourceforge and useing the "vcvars" batch files from the visual studio install on windows
octet\assets images, sounds and meshes for projects
octet\shaders source of example shaders
octet\doc this documentation
octet\external non-free assets and code
octet\open-source open source assets and code
octet\lib libraries for OpenAL, OpenCL and OpenGL
octet\packaging scripts for building distribution zip files
octet\src source code for the project