This is a major release, which took us ~ 5 month to complete. 0.4.0 is a clean rewrite of the existing system, with a strong focus on usability and stability. Not only it comes with a revamped design, it also features Networks to connect people operating in the same field.  A network has two primary goals:

• Ensure authors get read by the right audience.
• Ensure readers get what they need and nothing they don't.

Enjoy the new release and let us know what you think!

Substance 0.3.7 adds support for document versions, easing the publishing workflow. An improved version of Proper (0.3.1) is also part of this release.

Proper 0.3.0 adds full editing support for Firefox.

Added email based invitation of collaborators. Collaborators can either view and comment on documents or have full edit privileges. We've also added a password recovery dialogue.

Added a document export dialogue. Documents can now be exported to various formats on the fly, such as PDF, ODT, EPUB and many others.

Upgrade to Backbone.js 0.5.2. We use regular URLs now along with pushState instead of hash-fragment routing. Also Substance documents are now indexed by Google.

0.3.0 adds support for user comments as well as event notifications. There's also a new TOC-overlay and various layout improvements.

This release adds support for images. They can either be uploaded or embedded as Resources (using an URL).

Thanks to Transloadit for sponsoring image hosting!

Further improvements:

• The Rich Text Editor handles some more edge cases (still not perfect — damn you, HTML Command API!)
• Nested sections (3 Levels deep)
• Stability improvements (fixed some edge cases where data loss occurred)
• Improved persistence layer (Data.js 0.3.0)

Initial Release of Substance. It's considered as a Developer Preview, and thus unstable.

• Document Search (by Title and Creator)
• Filter by Attributes
• Semantic Editing
• Supported Content Types: Section, Text, Code, Quote, Question, Answer