Certainly, salmon is indeed a great source of vitamin D. It's important to note that vitamin D is relatively rare in foods, but there are a few other options aside from salmon:

1-Fatty Fish: Apart from salmon, other fatty fish like mackerel, sardines, and trout also contain significant amounts of vitamin D.

2-Cod Liver Oil: This oil, derived from the liver of cod fish, is an excellent source of vitamin D.

3-Tuna: Canned tuna, especially tuna packed in oil, provides a decent amount of vitamin D.

4-Egg Yolks: Eggs, specifically the yolks, contain small amounts of vitamin D. However, the exact amount can vary based on the chicken's diet and other factors.

5-Fortified Foods: Many foods are fortified with vitamin D, especially dairy products like milk, yogurt, and some plant-based milk alternatives. Check the labels to see if they are fortified.

6-Beef Liver: Beef liver contains some vitamin D, though the amount is generally lower compared to fatty fish.

7-Mushrooms: While most foods of plant origin have very little vitamin D, some mushrooms exposed to ultraviolet (UV) light can produce small amounts of it.

8-Cheese: Certain types of cheese, like Swiss and cheddar, contain a modest amount of vitamin D, although it's not as significant as in fish or fortified products.

Remember that the amount of vitamin D in these foods can vary based on factors such as the species of fish, the way the food is prepared, and whether the food has been fortified. If you're concerned about your vitamin D intake, consider getting tested and consulting with a healthcare professional for personalized advice. Also, keep in mind that sunlight is a natural source of vitamin D, as your skin produces this vitamin when exposed to UVB rays.