Energy is just power integrated over time, so real and reactive energy exists or not just like real and reactive power, respectively.

As for power, real power exists and reactive power is a mathematical convenience to simplify expressing certain things.  By using the mental shortcut of imagining imaginary power, we can simplify calculations and explain real observed parameters more easily than without.

Imaginary power doesn't exist, but the effects of it projected back to real power are real.  Large scale power grid producers and consumers are often rated in both the instantaneous real and imaginary power they are producing or consuming.  However, the same real observable characteristics can be explained other ways.  Explaining them in terms of imaginary power is merely a mental and mathematical convenience.

Do real and reactive energy exist?
There are so many techniques/methodologies in the life sciences that we can use to interrogate interesting questions. The thing is, most of us are completely unaware of the available methods we can employ. Rather, we go with the techniques we are familiar with or that are popular in our subdomains at the time. But that's pretty limiting.

So I'm wondering... we have databases for everything else... is there one for life sciences techniques/methods? Something like this could be immensely helpful in experimental planning. In particular, I think a comprehensive database would help scientists break outside of their spheres of familiarity and to employ less known (but potentially illuminating) methods to their questions.

I know there are journals that publish protocols and methods, but they are fragmented and don't encompass everything. 

Does what I'm looking for exist? If not, how might one go about creating such a tool? 
