Usually, cytoskeleton would be this "organelle"(cytoskeleton is more like just a protein network across the cell). Also, intercellular junctions and vacuoles(in plants) play a role.
MITOCHONDRION
The Mitochondria provides energy for the cell
cell wall
mitochondria
mitochondria
cell membrane
Cell Wall
Cell Wall
The cell organelle that provides strength and support for the cell membrane is the cell wall. It is found in plant cells and some prokaryotic cells, and it helps maintain the shape of the cell and provides structural support.
The mitochondria is the main organelle that provides energy for the cell. The second organelle is the Golgi apparatus. It stores, transports, and releases the energy inside and outside of the cell.
mitochondrion
The nucleus