Jesus...everything man.....but I suppose Ill roll with the top tools
1. My steam cleaner. It has a million and one uses
2. Electric heat stick. Damn, just damn. this thing made home brewing at home (vs outside) possible. 2 hours to get a rolling boil was NEVER acceptable.
3. Cool brewings coolers. Really upped my game in brewing quality, and really, it did more than anything to do so. It also works great as a keg cooler (fits two of emmn!) and is just cool overall.
4. Homemade stir plate. This thing is damn awesome. With the cool brewings cooler, it has the 2ed highest impact on making my beer THAT much better.
5. Kegging equipment. really, all of it.CO2 tank, regulator, Kegs, mini-fridge, etc. They really make drinking beer MY way, in size servings less than 12 oz,possible . I love all my kegging stuff
6. wort chiller. this thing really helped streamline brewday
7. Refractometer. This one was really cool to have, but wasn't THAT important compared to everything listed above. It is a cool thing to have however, and makes getting my suggar levels that much easier. so its a cool gizmo, but not as cool as everything else above
8. Auto-siphon- nuff said. You just need one
Honorable mentions (for being hugely low tech):
-Paracord carboy handle. this thing really makes moving my carboy when its empty a breeze, and makes moving it when its full possible. Really low tech, but hey, it works
- Rubber work gloves. Seriously. These things are just DAMN useful...for..well..everything. Moving carboys, handling freshly steamed hot jars (how I clean, and transferring hot wort from pot to mash tun. they do it ALL and man, I cant imagine brewing without emmn. really, really low tech, but yea, just as useful.
- Spray bottle. Seriously! this thing has a MILLION and one uses. Cleaning the mash tun, controlling boil, and making sure that candy sugar doesn't overflow and harden on my stove-top, its just damn useful.
But really. its hard to take any of those things out of my collection of brew equipment.
I need it all to make good beer