I guess these are insects but they're not moving! This is on an outdoor plant I brought in for the winter.

Aphids.

Those are aphids.

Looks like aphids to me.

Thanks. What's a good way to remove them?

here new member! There are several natural ways to remove Aphids. I have used the following: Before I use anything else I try to kill the Aphids by just raking my fingers over the infected areas and mashing them. Some of them will fall off and come back on the plant later, so...Make a spray of one part vinegar and 3 parts water. Spray the infected area. Spray the vinegar mix on again next day. I have made a spray using red peppers and water, garlic and water, and chili powder and water. There are many insecticidal sprays you can buy, but I like to make my own. The vinegar method has always worked best.

I have also used a little dish soap and water and this has been effective.

Please don't spray your plants with vinegar. If you don't want to invest in pesticide, use soapy water. Mix 1 tablespoon of soap (soap, not detergent read the label) in a gallon of water.

Thanks everyone.
Thoughts on using rubbing alcohol to wipe them off (and hopefully kill the ones that you miss)?

I squash them with my hands, I have gloves on of course. Then I keep coming back a few days after.

Persistence is key to long term success.