Starfish

Starfish by Michael Weizmann is a Grasshopper plugin that allows parametric generation of various patterns. It focuses on 2d tessellations that can be used to create structural systems based on topological interlocking principle. Additional Starfish components include several curve and interface tools.

More details on the logic of the main Starfish algorithms can be found in a recent paper:
Topological interlocking in architecture: A new design method and computational tool for designing building floors

For further reading on topological interlocking:
Topological Interlocking in Architectural Design
Topological interlocking in buildings A case for the design and construction of floors
Structural Performance of Semi-regular Topological Interlocking Assemblies