507Movements.com - an online edition of the classic technical reference Five Hundred and Seven Mechanical Movements by Henry T. Brown. Original illustrations and text from the 21st edition, published 1908. It also includes animated versions of the illustrations, and occasional notes by the webmaster.
Animagraffs.com - in-depth, x-ray style look inside different machines
TILvids.com - video community focused on sharing original edutainment content
Language Learning
RosettaProject.org - a global collaboration of language specialists and native speakers working to build a publicly accessible digital library of human languages.
LibreLingo.App - an experiment to create a community-driven language-learning platform
LibreTranslate - Machine translation API for text and documents that is self-hostable, can be used offline, and has a free webapp.
Wikiversity.org - learning resources, learning projects, and research for use in all levels, types, and styles of education, including professional training and informal learning
OERCommons.org - tailored and context-specific services for individual institutions, consortia, and organizations looking to have a more intentional impact
OpenStax.org - nonprofit initiative of Rice University, publisher of open education resources (OER) and a provider of interactive learning technologies and education research
WikiEducator.org/Main_Page - evolving community intended for the collaborative authoring and organising courseware for OERu, planning of education projects, building open education resources (OERs) on how to create OERs, networking on funding proposals developed as free content
OpenCourseLibrary.org - high quality, free-to-use courses that you can download and use for teaching
TextBooks.aimath.org - The American Institute of Mathematics (AIM) seeks to encourage the adoption of open source and open access mathematics textbooks
EnlightenKnowledge.com -
EnlightenKnowledge is a dedicated platform for exploring and sharing insights in Information Science, Library Science, Information Literacy, Digital Literacy, Research, and Information Management.
HumanRestorationProject.org - A non-profit organization listening to students, enacting systems-based change, and reimagining education.