Tween20 is the base of most wetting agents.
Dutch masters Gold Range Saturator (wetting agent and transfer into leaf surface) A Surfactant. Protrans Technology
Microlife Hydroponics has a good product at a much lower price.
Dutch Masters Liquid Light (for carbo's) minerals, carbohydrates, amino-acids and phyto-nutrients.
This products stress the plants to produce enzymes to help defend the plant. This product works best if you do not have health plant. If you have healthy plants it does not work as well or not at all.
Halo or Messenger (harpin protein) Claimes to end Powdery Mildew and allow nutrients to work better.
The best silica on the market? That is a tough one. I have used a lot of silicate products on the market and after 20 years I still use pro tek as the base to judge any silica products.
Cyco Silica -good stuff (Potassium Silicate). cell walls, plants ability to handle heat stress, bending branches without breaking, increases chlorophyll in leaves.
After 20+ years Dyna Gro's Pro Tek is the standard to judge silica in my gardens.
Pro tekt- Silica (This is not as good as cyco product.)
I have never used this product, so I can't give a comment about it.
Calcarb- CO2 foiler spray
This product claims to have large amounts of enzymes from the seaweed extraction method they use. It seems to work, not claiming it is any better or worse then any other brands.
Nitrozyme- seaweed Nitrogen