Archiving

Allows archiving of pages and posts, including Facebook

User-friendly archiving - particularly with the Wayback Machine browser extensions for Chrome and Firefox. Doesn't work on Facebook

Conifer

Formerly known as Webrecorder, an archiving service that asks you to set up your own account to save collections, with 5GB of space free, and also share and download them. Strong on social media.

Video Vault

Preserves online video with downloads and metadata