As Demotivator has mentioned about milliequivalents.Here is the more detail matter:
Yes its very similar to the mole concept.You only got to stick to one thing that is equal number of equivalents will react to give equal number of equivalents.
Where equivalent weight=Molecular weight/n factor
Here n factor depends upon the nature of reagent.
For H2SO4 n=2[number of replacable H+ ions]
For NaOH n=1[number of replacable OH- ions]
For elements n=Valency
For salts n=Charge on cationic or anionic part.
This method is Extremely useful as it can be used without knowing the nature of reaction[no need of balancing].
But it can only be used if you know the n factor of the reagents correctly.