I have a recommended tools and resources page over at Maker Hacks but I realized this niche needs a different list so as I use/write about something I will add it to the list here and start linking out to places where you can get the same item or similar.

Hand Tools

Saw

Stanley Knife

Craft/X-Acto Knife

Wire Brush

Sculpting Tools

Cutting Mat

Straight edges and rulers

Dremel

Pin Vise

Sand paper

Handheld Sanders

Proxxon Hotwire Cutter 

Handheld hotwire cutter

Heat Gun

Electronics

Soldering iron

Desoldering station

Air filter/extractor

Wire

Shrink wrap

Solder

Wire stripper

Microcontroller boards

PPE

Dust Mask

Eye Protection

Glue

Hot Glue Gun

Elmer’s

Tacky Glue

Super Glue

Accelerant

Mod Podge

Spray glues (Super 77)

Sculpting

GreenStuff

Fimo

Sculpey

Milliput

DAS

Spackle

Sculptamold

Painting, Paints and Lacquer

Cheap Brushes

Good brushes

Brush Cleaner 

Cheap Paints

Matte Medium

Ink

Flow Aid

Branded miniature paints

Primer

Wet Palette

Cheap Airbrush + Compressor

Nice Airbrush + Compressor

Portable USB Compressor

Airbrush cleaner

3D Printing

Resin Printers (for details, miniatures)

Resin

FDM/Filament Printers (for larger items, big props, terrain)

Filament

Tools for 3D Printing

Laser Cutting and Engraving

CNC