Knotter is a highly configurable interlace designer.
Interlace patterns are a kind of design historically used as a decorations in many places and by different cultures, some examples are Celtic knotworks and Islamic interlaces.
Knotter aims to allow its user to design such patterns in an intuitive way and to provide easy ways to integrate the result in external general-purpose graphic software.
For this purpose, designs created within Knotter can be save in a custom human-readable...
Tux's Turtle is a drawing environment for children. It uses geometrically-based "turtle graphics" (well known from Logo) but is completely immediate and programmed using single keypresses (like Delta Drawing). No knowledge of the editor is necessary.