Samples
Blind Watch Maker 1
Download
Find Words
forth
Fractal Benchmark
Genetic Algorithm
Gtk Source Editor
Hex Dump
Notepad
Point
Shapes
Simple English Parser
Sizes
TPK
Word Count
The Sample Programs do reasonably interesting things. Some can be used as command line utilities, others demonstrate interesting concepts like "cumulative selection", and so on. The programs use whatever features of Cobra are needed to accomplish the purpose of the program.

In contrast to these sample programs, the How To Programs explicitly demonstrate language features and techniques. While the programs themselves are rather purposeless, they make good tutorials and have an explicit order.