There is a (very) introductory tutorial to Seed, covering the creation of a small GTK+ WebKit browser, here

There is a document covering at a broad level, how things in a namespace are mapped to Seed when importing, here

The C API is documented here

Documentation on the Seed builtins and runtime is here

Seed has a wide variety of examples in git. A partial index of some of the more useful examples is below:

• accelgroup.js - Demonstrates using GtkAccelGroup
• actions.js - Demonstrates the use of GConf actions
• async-quine.js - Reads itself with GIO using async calls
• broken - Several old examples, or old versions of examples which have not been updated
• browser - The simple WebKit browser outlined in the tutorial.
• calculator.js - A simple GTK calculator.
• clutter-0.8.js - A silly demo of Clutter 0.8.
• clutter-0.9.js - The silly Clutter 0.8 demo ported to 0.9
• clutter-cairo.js - Simple use of ClutterCairo (0.8)
• clutter-cogl.js - Demonstrates usage of cogl for drawing in Clutter.
• clutter-pad - An example to prototype Clutter scripts using a GtkSourceView widget and a GtkClutter stage. Demonstrates usage of sandbox module and GtkBuilder.
• clutter-shader - Demonstrates the use of Clutter Shaders and GtkSourceView
• clutter-transitions - A library of slide transitions written with Clutter 0.9
• dbus-banshee - Demonstrates the use of DBus to control Banshee.
• dbus-consolekit - Demonstrates the use of DBus to query ConsoleKit.
• dbus-networkmanager - Demonstrates the use of DBus to query NetworkManager.
• gconf.js - Simple GConf usage (reading keys)
• gdkpixbufloader.js - Demonstrates reading an image with GIO and loading it in to a GdkPixbuf.
• glib - Several examples of using GLib, including timers, timeouts and threading.
• Gnio.js - Basic client usage of GIO.
• Gnio-server.js -Implementing a server using GIO
• gtkplug.js - Demonstrates GtkPlug usage.
• gtktextview.js - A very simple use of GtkTextView
• gtktreeview.js - Demonstrates the use of GtkTreeView
• json-reddit.js - Uses GIO and JSON to parse the reddit homepage.
• ls.js - Enumerating a directory with GIO.
• n-oscillator.js - Demonstrates basic Gtk and GStreamer usage.
• notify-test.js - Usage of libnotify
• opengl - Reimplementations of classic opengl examples in Seed (including glxgears!)
• pango-fontset - Demonstrates basic Pango usage (for querying font information)
• pango - Demonstrates a bit more complicated Pango usage, and Clutter usage, to create a sort of font playground.
• pong - A simple Clutter 0.8 game.
• poppler.js - A simple PDF viewer, demonstrates poppler and GTK
• quine.js - Reads itself with GIO
• repl.js - The Seed REPL
• same-seed - A reimplementation of Same GNOME in Seed and Clutter 0.9
• soup.js - Basic client usage of soup.
• threaded-repl.js - An example of a REPL which runs async while a GTK program continues to run
• turtle - a simple example of the C embedding API to create a logo like turtle.
• twitter - A moderately simple Gtk twitter client, demonstrates GIO, Gtk, GdkPixbuf...
• video.js - Runs the GStreamer video test.
• vte-test.js - A simple terminal using VTE
• xml-dom - Demonstrates the use of the libxml module for basic document access using DOM methods.
• xml-tree - Demonstrates the use of the libxml module for basic document access using the document tree.
• xml-xpath - Demonstrates the use of the libxml module for basic document access using XPath.

Seed has several C extension modules, to bind libraries not available from GObject-introspection.

Bindings around GNU readline, documented here.

Bindings around sqlite, documented here.

A reimplementation of HTML5 canvas, with some Cairo integration. Documented here

A module similar (nearly identical) to python's os module. Not yet documented, python os module documentation is useful.

A module which allows execution of code in isolated sandboxes, with new global objects. Documented here

A module which allows usage of DBus. Not yet documented, but see the dbus-banshee or dbus-consolekit examples.

A module which allows basic usage of libxml. Not yet documented, or complete, however very similar to the libxml2 python module.