Resume.io can help you build a great résumé; there’s no doubt about that. It trades blows with FlowCV (my next pick) point-for-point, and I had a hard time deciding which would rank first. Once you’re done, you can easily swap between the small list of templates Resume.io offers. More than anything, the auto-tailor feature weaves in keywords from the job you’re looking at, highlighting how your experience may tie into certain job responsibilities. You can design a résumé and cover letter for free, but you'll only be able to download them as a text file.