There is a long history of digital manifesto writing; going all the way back to the Hacker Manifesto from 1986 and the Indie Web Manifesto from 1997.
A web manifesto can be as simple as a document explaining why you wanted to create a site; it does not need to be political or activism focused, although those are often themes in manifestos. It can simply be your reasons for participating in a cause. Many Web Revival enthusiasts like to write their own manifestos and we have a collected list of active links here.
Feel free to add your own or any you know are missing!
Links marked with an asterisk (*) go to wayback machine links.
Sources and References: Many links were imported from the former Yesterweb list.