Julia (<a href="http:&#x2F;&#x2F;julialang.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;julialang.org&#x2F;</a>) is an example of a system that combines the three. The JIT compiler is available at a REPL, pre-compiled packages available in v0.4 may be considered as coming from a build system, and the package manager comes with every Julia distribution.