memento-client (src, npm) - JavaScript client to interface with Memento services
archive.is - (src, npm) - Memento-based API for archive.is in JavaScript
memento-cli - (src) - A command line tool interacting with Memento (RFC 7089) supporting web archives, such as the Internet Archive's Wayback Machine
Server-side Enablers
django-memento-framework (src) - Add Memento support to Django applications.
invenio-memento - (src) - Add Memento support to Invenio sites.
Linked Data
Apache Marmotta - An open implementation of the W3C Linked Data Platform specification, which supports versioning and access to versions compliant with the Memento protocol.