The Public Domain Review

A beautifully curated collection of public domain art (images, books, film, audio) that is searchable by type, time period, or keywords.

OSCQR

The Open SUNY Course Quality Review process has the best course design rubric in the industry. It is open so you can adapt it to your own institution.

LibreTexts

UC Davis hosts a powerful program for open textbooks (CC-BY-SA-NC). Topics trend towards STEM, but there are some Humanities there as well. Great interface and search with amazing resources.

Thingiverse

The most popular community site for 3D models! People are encouraged to license their creations under CC, so many of the items here can be remixed.

Open Learning Initiative

The OLI is an online learning platform with content for educators and students. The platform centers around student-centered measurable learning outcomes. Mostly STEM courses, but not all. Brought to you by Carnegie Mellon.

LearningPod

A great repository with hundreds of thousands of assessment questions. The project was abandoned in 2015, but the bank of questions is still available. Search by topic and/or keyword.

PEXELS

Beautiful stock photos, all CC-0. Modify, copy, and distribute the photos however you want.

FlatIcon

Tons of modern CC-BY icons! Search by keyword, and then choose the file type (.png, .psd, .svg, .eps) and the size. An incredible collection that will cover most of your icon needs.

NASA Images

The search interface of images, sound clips, and videos is super slick. Most content is generally free to use, but for commercial use you should check out their guidelines.

The Math Images Project

The Math Forum is a comprehensive site with many different resources. Of particular note is the Math Images Project, which provides lots of free math related images, organized by topic. Images shared under GNU FDL 1.2, which is just like CC-BY-SA.

Public Domain Fonts

All the fonts here are in the public domain, so you can download and install them (and modify them, if that’s your thing). The site is ad-supported, so be careful what you click on!

JHSPH Open

These open classes are licensed under CC BY-NC-SA, and can be remixed for whatever purpose you want. Health topics such as Health, Biochemistry, Biostatistics, Epidemiology, Mental Health, and more are available.

unpaywall

This extension (both Chrome and Firefox) pops up when you are at a journal abstract. Clicking on it will legally serve you free access to this content (if at all possible).

Open Source Repositories

Software engineers were some of the pioneers of the open movement. This GitHub page is a repositories of repositories – a great resource if you want to leverage code for some projects (Bootstrap, for instance). But there are also free books listed here as well.

Open Educational Resources

The College of Earth and Mineral Sciences at Penn State has released a number of courses with assets that can be reused and remixed. The classes are mostly in energy, geography, geosciences, meteorology, and other related disciplines

Directory of Open Access Journals

The DOAJ hosts a huge database of open access journals. The organization and search functions are great, and you can look up individual articles or entire journals.

Compfight

Compfight searches for images (many from Flickr) with a slick filtering system (tags, licensing, safe, etc.).

Community College Consortium for OER

The CCCOER is a wonderful resource for understanding open and for discovering content. The catalog of OER repositories they have is well organized.

Open Access Button

This is a Chrome extension that allows users to request access to content – like journals – that is behind a paywall. There’s a bunch of people working hard behind the scenes to get you what you need and make it available to the world. This is not truly open, because the content isn’t all open,…

Open Textbook Library

Run by the University of Minnesota, the Open Textbook Library is a collection of open textbooks, searchable by subject. Great interface, and the catalog is very good.

WikiBooks

WikiBooks is a website that allows for crowd-sourced content (anyone can edit a book). The content tends to be very good, though the look and feel of the website is very utilitarian.

Open Course Library

Open Course Library has a catalog of completely free and open courses – all content is nicely organized in Google Drive so it is easy to reuse.

Amazon Inspire

We don’t know exactly what is happening at Amazon Inspire, but it looks like Amazon will be a great repository for open content for K-12 institutions. They are in the Beta version now, so stay tuned!

Open Stax

Although a small collection of books, these open books are authored by professionals and peer reviewed. They also align with standard scope and sequence requirements. The books are available online and as a PDF, although some of them can also be ordered in print (~$30) or obtained in the iTunes bookstore.

Saylor

Saylor offers full-length college level courses online. The courses are all open, and can be adapted easily (they even make a guide for it!)

OER Commons

One of the best resources for open content! This site is indexed and searchable (by topic, by resource type, by academic level, and by standard), and the content is reliably open (and vetted).

Vimeo

Just like YouTube, there is a way to filter search results by license. Unlike YouTube, you can find videos based on specific licenses under Creative Commons (CC BY, CC  BY-NC, CC BY-NC-SA, etc.).

YouTube

Although the standard license in YouTube is not Creative Commons, contributors can elect to publish their videos as CC BY. Once you search for a video, you can filter the results by license and get a list of all the Creative Commons videos.

Wikimedia Commons

All the images at Wikimedia Commons are either public domain or licensed under Creative Commons (the specific licenses vary). There’s a good search mechanism and the attribution is easily accessible

Flickr

Not all images at Flickr are under a creative commons license, but many of them are and the search function allows for searching by license.

Open Cart

Open source software for online shopping. You don’t need a lot of technical know-how to get this up and running, and the final product is pretty clean and sweet.

Open SUNY Textbooks

Open SUNY Textbooks is an endeavor of the State University of New York and provides high-quality textbooks written and edited by professionals.

Free Sound

A repository of sound effects (some of them have been used in Hollywood movies!). The CC licenses are in plain sight for each sound.

Inkscape

Inkscape is open source software for making illustrations and vector images. You can download this for PC, Mac, and Linux.

Public Domain Vectors

A wonderful directory of public domain images and illustrations. There is a good search function, and even web-based tools for creating and editing SVG files.

Photy

A searchable index (by keyword, by license, and orientation!) of photos and illustrations in the public domain and under Creative Commons

Vecteezy

A great collection of vector art – and you can modify it online before downloading!. Some art is not CC, but the majority of it is. Downloads include .jpg, .ai, .pdf, and .eps).

Videezy

A wonderful collection of Creative Commons stock footage. Searchable by keyword and by category.

Public Domain Pictures

Tons of images in the public domain that are searchable. You can pay for premium downloads.

My Open Math

My Open Math is a tool for math educators that helps students learn – for free – with interactive tools.

Stock Footage

A great collection (from Archive.org) of stock footage. Licenses vary, and most of these clips are not meant as standalone assets – they are designed to be incorporated into bigger projects.

Videvo

Free stock video! The licenses are very flexible (many CC BY), and new content is added every week.

SoundBible

A huge catalog of sound effects. Very clear attribution for all the sounds (which are mostly CC BY and public domain).

Google Open Source

Google has provided over 2000 open source projects, and this site shares all their work. This is exceptionally valuable to developers, but magnificently demonstrates the power of open to everyone.

Incompetech Music

Amazing music licensed as CC BY. Much of this music is available in the YouTube Video Editor, too. A huge array of music genres.

MERLOT

A phenomena, curated collection of OER. Searchable by topic, and filtered by type (textbooks, case studies, quizzes, etc.)

Schema

Schema is a way Instructional Designers and educators can tag their content to make it more discoverable. It’s a well-structured, standard metadata scheme.

Scribus

Scribus is open-source Desktop Publishing software (it works on Windows, MacOS, Windows, and other operating systems). It’s been around since 2001, and is probably the most robust piece of open-source Desktop Publishing software available.

Pond 5

Pond5 hosts a huge repository of video, images, audio clips, and 3D renderings. They also have a paid section. Follow the link below for a huge amount of public domain content. https://www.pond5.com/free “Whether you’re a filmmaker, musician, designer, student, or just a history buff, the Pond5 Public Domain Project is making copyright-free media available for you….

Open Clip Art

All the clip art here is released to the public domain for a frictionless experience! https://openclipart.org/ “All Clipart are Released into the Public Domain. Each artist at Openclipart releases all rights to the images they share at Openclipart. The reason is so that there is no friction in using and sharing images authors make available…

Sample Swap

A great, curated collection of electronic music. You can search by music type (like dubstep, house, hip hop) and also by license (attribution, share alike, etc.). There are ads on this site, and some of them look like download buttons, so be careful. This site also has a good database of sound effects. Even a…

Free Stock Photos

A small collection of 2000 stock photos. The organization is a little peculiar, but the photos are very good.

Freepik

A great site with resources for designers (icons, photos, stock images, etc.). There is a freemium model, and you can pay for access to more content, but there are thousands of open assets here. http://www.freepik.com/ “Freepik offers users, high quality graphic designs: exclusive illustrations and graphic resources carefully selected by our design team in order…

Pixabay

Clip art, photos, and illustrations that are all released under Creative Commons 0! http://www.pixabay.com/ “All images on Pixabay are released into the Public Domain under Creative Commons CC0. Therefore, the images can be modified and may be used freely for any application – also commercially and in printed format. Attribution in appreciated, but not required.”

Gratisography

A great resource for copyright-free, whimsical photos. Many of the photos have subtle editing that lend a creative look to your project.

Free Music Archive

The Free Music Archive is an interactive library of high-quality, legal audio downloads directed by WFMU. If you’re looking for high-quality, full-length audio tracks (sorted by genre), this site is exactly what you need.

Open Music Archive

The Open Music Archive digitizes and distributes sound recordings that are out of copyright. http://www.openmusicarchive.org/ The Open Music Archive aims to gather together information about and recordings of public domain music. This is music whose copyright has expired. This music can be used by anyone for any purpose.

College Open Textbooks

A good place to go when looking for content. You’ll likely have to invest time in finding great content. This site aggregates different resources – although the organization is great – but some of the links bring you to dead links, content that isn’t easy to edit, and content that is old.

Unsplash.com

One of the best places to go online for professional grade, CC0 images.

Open Game Art

A nice repository for game art, game music, and game sound effects. This site features a filter by Creative Commons license, too! http://opengameart.org/