SeismoMatch is an application capable of adjusting earthquake accelerograms to match a specific target response spectrum, using the wavelets algorithm proposed by Abrahamson  and Hancock et al. . Some of its features are:
Simultaneous matching of a number of accelerograms, and then creation of a mean matched spectrum whose maximum misfit respects a pre-defined tolerance.
Possibility of using this software in combination with records selection tools and records appropriateness verification algorithms to define adequate suites of records for nonlinear dynamic analysis of new or existing structures.
Capability of reading single accelerograms defined in both single- or multiple-values per line formats (the two most popular formats used by strong-motion databases) or of reading a number of accelerograms at the same time (if they are defined in the single-value per line format).
Creation of the target spectrum by following Eurocode 8 rules, by computing the spectrum of a specific accelerogram or by simply loading a user-defined spectrum.
The following strong-motion parameters are then computed for the matched accelerograms:
Elastic response spectra and pseudo-spectra
Overdamped and constant-ductility inelastic response spectra
Root-mean-square (RMS) of acceleration, velocity and displacement
Arias (Ia) and characteristic (Ic) intensities
Cumulative absolute velocity (CAV) and specific energy density (SED)
Acceleration (ASI) and velocity (VSI) spectrum intensity
Sustained maximum acceleration (SMA) and velocity (SMV)
Effective design acceleration (EDA)
In addition, SeismoMatch also features a module in which a user can combine many matched accelerograms in order to obtain a combined mean spectrum that fulfils the user's requirements regarding maximum and mean misfit.
Finally, and due to its full integration with the Windows environment, SeismoMatch allows for numerical and graphical results to be copied to any Windows application (e.g. MS Excel, MS Word, etc.), noting that the plots characteristics can be fully customised from within the program itself.
A fully working version of the program may be downloaded from here.