You can try
github.com/oschulz/UnsafeArrays.jl
UnsafeArrays.jl provides allocation-free arrays views, with some limitations. Most importantly, as @yuyichao already noted, pointer-based array access has to be used with great care and deliberation. In my experience, even frequent allocation of views doesn’t usually have a serious impact on performance in single-threaded use. With heavy multi-threading, though, view allocation time can currently become a limiting factor.