I saw from a recent Reddit thread that there are several static site generators in Racket. They vary in the markup language that can be used for pages, and the extent to which individual pages can have programmatically generated custom content.
Interesting options include
racket darwin (a fork of the dormant frog project; not related to ‘darwin’, Apple’s open source Mach kernel for operating systems)
pollen (that was written to make web books such as Practical Typography)