The Vinyl Spectrum - Oracal 651 and Siser HTV
US Cutter - transfer tape (it's humid in Alabama, so I use AT75)
Southern Craft Supply - if you're near central Alabama and need vinyl or blanks that day
Bama Sign Supply - Southern Craft Supply's mother company also in central Alabama
The Hungry JPEG - great font and graphics bundles with commercial licenses
Font Bundles - another great place to get commercial use fonts cheap
Creative Market - a good place to find mock-up packages
Font Brothers - commercial use monogram fonts - circle - vine
DaFont - free commercial use monogram fonts - circle - curly
Pinterest - the easiest way to find what you're looking for
7-Zip - if you need a program to extract zip files
Adobe Illustrator and Photoshop - what I use to design
Inkscape - freeware program like Illustrator
GIMP - freeware program like Photoshop
Procreate - what I use to sketch on the iPad