* Ribosomes: These are the protein synthesis factories of the cell. They are made of RNA and protein, not a lipid bilayer membrane.

* Centrioles: These are involved in cell division and the formation of microtubules. They are composed of microtubules themselves, which are protein structures.

* Microtubules: These are long, hollow cylinders that provide structural support, help with cell movement, and transport materials within the cell. They are made of a protein called tubulin.

* Microfilaments: These are thin, solid rods made of the protein actin. They play a role in cell movement, shape, and division.

* Intermediate filaments: These are rope-like structures made of various proteins that provide structural support and help with cell-cell junctions.

Let me know if you'd like more details on any of these organelles!