I set out to using free, open-source web fonts for a particular project lately. I’ve had bookmarked some articles a while back with some pretty cool combinations that will help the Design process move a long a bit faster. To name a few:
In those articles where screenshots of sample combinations. I just saved them to my local drive for comparison. If you don’t have Adobe Lightroom (for its Survey or Compare views) or Adobe Bridge (for its Thumbnail view) but are on OS X, you can use Preview to compare the stills.