I find Jekyll to be very easy and useful to maintain static html sites and blogs, especially along with GitHub pages. Wanted to know if there are any Static site generators or CMS which helps in maintaining Jekyll sites with live preview, inline editing, layout management, file management etc.
There's an emerging market of "headless CMS" services that let you (or other writers) edit content through a web interface, and then access this content via an API. Most have webhooks that could be used to trigger regeneration of the static site when the content stored in the CMS is changed. Libraries for jekyll integrations already exist for these platforms.
List of headless CMSes: