Create your own distilled water for watering sensitive plant species, watering terrariums without leaving mineral residue, and using for emergency purposes.
Nice little fogger to create a mist / cloud forest effect in terrariums and vivariums.
My favorite timer that I use for all of my lighting and also for fans in some cases when I need periodic air movement.
One of the fan models I use a lot (they have various sizes and powers too)
Simple controller to adjust the speed/power of PC fans so you can dial in the right amount of air movement for each terrarium or grow tank.