The first is a foot roller, or foot wheel. You can get an idea of what one looks like from the image below. Feet require much love and care for runners, because with each step while running we are slamming 2.5 times our body weight into the ground through our feet. And because we are one body, if our feet get tight enough then our Achilles tendon, calves, thighs, IT band, glutes, hips, lower back, upper back, and neck can sequentially get tighter and become more prone to injury.
The second is a theracane, which you can see an image of below. This odd looking massage tool is very effective for getting to just about anywhere on our bodies. The knobs are useful to jam into knots and feel the sweet release of tight muscles. The cane shape allows for getting at hard to reach spots on our backs and other areas. It also creates some leverage to get into knots in general.
This one is a classic, and a must for every runner's massage toolkit. They come in many shapes and sizes, and I don't really see much of a difference between the various options available. I personally use one that's about 18 inches long in order to have the freedom to roll sideways over the roller to get at more of my body without having to shift the roller itself around.
Most runners have tight legs and hips, so rolling out those areas is very helpful. Rolling 3-5 times a week for several months can address injuries related to the IT band or excessively tight calves, for example. Another less known trick with foam rollers is to find the troublesome spot and lay stationary on it for 1 to 3 minutes. When it comes to releasing a specific knot, there is the technique.
I've been using all three of these tools for years, and my only regrets have come when I fail to make use of them. And don't forget, consistent use goes a long way!