Hi John,

The spot on your snake plant looks like a fungal spot. I would recommend removing and disposing of the infected leaf to prevent spread of the fungus. Make sure your plant is receiving good air circulation and that you are directly watering the soil, rather than splashing water over the leaves when you water. 

I'm not sure exactly what species of aloe you have, but it is a beautiful specimen! The trunk is likely just an indication that the aloe plant is quite old and has had enough time to form a woody base. Here is some information on aloe care from https://hort.extension.wisc.edu/articles/small-aloes-interesting-colorful-and-easy-succulents/:

"Aloes are best grown in a well-drained potting mix, in a pot with a drainage hole. The roots should not be allowed to be continuously wet – allow the soil to dry between waterings. Most aloes are from summer rainfall areas and therefore are summer growers. In Wisconsin, even the smaller types can be given full outdoor sun in the summer, and, if the soil is very well drained, can tolerate frequent rains, especially during the warmer months of summer. When the weather is cool and cloudy they are best kept on the dry side, including during the winter when they are less actively growing. Most aloes are very cold sensitive and should be protected from prolonged temperatures below 50°F; certainly protect from frost. During their winter rest period smaller plants can be grown in a bright windowsill, though keep in mind they should not be allowed to suffer temperatures much below 55°F, so you may want to take them off the windowsill during those -30°F nights."

Thanks!

Hania