Marco, a reader of RTL-SDR.com and user of our sister site sigidwiki.com has been developing some Windows software to display the sigidwiki.com database in an easier to access format. The software is called Artemis and can be downloaded from http://markslab.tk/project-artemis/.
Artemis allows for various example signals to be quickly viewed with the corresponding example waterfall image, frequency, bandwidth and other information. There is also a filtering function that allows you to search by frequency and type of signal.
Marco writes that he would love to hear any user requests for new features such as more filters, improvements, or anything else as well as any bug reports. We also note that data such as frequencies and bandwidths provided in the sigidwiki.com database may not yet be 100% correct since the wiki is relatively new and is yet to mature.