At the rOpenSci unconf the group that made the packagemetrics 
did a demo specifically on table-making packages (tableGallery) which is great! There's even an ultra-meta formattable table comparing package tables in the packagemetrics blog post.
David Hugh-Jones (author of huxtable) also did a great table comparing table-package features in the Design Principles, Comparisons and Limitations section of the huxtable docs!
(below is just a screenshot, definitely worth taking a look directly)
- n.b. The tableGallery seems to have been moved here.