Name another living organism,other than plants,that can use light to perform photosynthesis

Photosynthesis is most commonly associated with plants. In this process, plants consume carbon dioxide and water in the presence of sunlight. The resulting products of this process are glucose and oxygen (and energy, in the form of ATP molecules).
However, plants are not the only ones who can carry out this process. Cyanobacteria are also capable of carrying out the process of photosynthesis. These are prokaryotic organisms and have a size ranging from about 1 micron to 100 microns. These are also known as blue-green algae (although technically cyanobacteria are prokaryotes, while algae are eukaryotes). Cyanobacteria have much less complexity as compared to plants and algae.
Cyanobacteria have been present on Earth for a really really long time. They are also thought to be responsible for increasing, through photosynthesis, the oxygen level in our atmosphere in the early age of our planet.
Hope this helps.