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+Descriptions of the Servo source directories. For the most part these represent a single
+crate or library.
+
+## Servo and Rust projects
+
+These are the main servo projects, as well as projects that are pure Rust (not bindings).
+
+* _rust-css_ - A CSS parsing and selector matching library, based on libcss and currently
+    using libcss for the implementation, but not exposing any libcss internals
+* _rust-geom_ - Generic math library
+* _rust-http-client_ - An HTTP library in Rust, using libuv via the Rust standard library
+* _rust-io-surface_ - OS X implementation of cross-process surface sharing. Used by sharegl
+* _rust-layers_ - A simple scene graph
+* _servo_ - The Servo web browser engine
+* _servo-gfx_ - Servo's graphics subsystem
+* _sharegl_ - A library for sharing drawing surfaces between processes
+
+## Bindings
+
+* _libcss_ - The CSS library from the NetSurf web browser. We are using this for parsing
+    and selector matching until we have a Rust solution
+* _libhubbub_ - The HTML parser from the NetSurf web brsower. We are using this for parsing
+    until we have a Rust solution
+* _libparserutils_ - A parsing library used by libcss and libhubbub
+* _libwapcaplet_ - A string internment library used by libcss and libhubbub
+* _mozjs_ - SpiderMonkey, forked from mozilla-central
+* _rust-azure_ - mozilla-central's graphics abstraction layer and bindings
+* _rust-cairo_ - Bindings to the cairo drawing library
+* _rust-cocoa_ - Bindings to OS X's Cocoa framework
+* _rust-core-foundation_ - Bindings to OS X's Core Foundation framework
+* _rust-core-graphics_ - Bindings to OS X's Core Graphics framework
+* _rust-core-text_ - Bindings to OS X's Core Text framework
+* _rust-fontconfig_ - Bindings to fontconfig
+* _rust-freetype_ - Bindings to FreeType
+* _rust-glut_ - Bindings to GLUT
+* _rust-harfbuzz_ - The harfbuzz text shaping library and bindings
+* _rust-hubbub_ - Bindings to libhubbub
+* _rust-mozjs_ - Bindings to SpiderMonkey
+* _rust-netsurfcss_ - Bindings to libcss
+* _rust-opengles_ - Bindings to OpenGL ES
+* _rust-stb-image_ - The stb-image library and bindings
+* _rust-wapcaplet_ - Bindings to libwapcaplet
+* _rust-xlib_ - Bindings to xlib
+* _skia_ - The Skia drawing library
+
+## Other
+
+* _contenttest_ - Test harness for JavaScript bindings
+* _etc_ - Miscellaneous
+* _reftest_ - Test harness for comparing Servo output to Firefox
+* _test_ - Test cases