A list of online resources I found that may be useful for web designers. Perhaps others can add to this list.
Color: Colorion http://www.colorion.co/
Color: Color Hunt http://colorhunt.co/
Color: ColorBlender http://www.colorblender.com/
Color: COLOURlovers http://www.colourlovers.com/
Color: Coolors - Material Golor Generator https://coolors.co/
Color: Flat UI Colors http://flatuicolors.com/
Color: Pantone Colors http://pantonecolors.org/
Color: Paletton http://paletton.com/
eCommerce: Clover Donations https://www.cloverdonations.com/
eCommerce: ecwid http://www.ecwid.com/
eCommerce: Gumroad https://gumroad.com/
eCommerce: Stripe https://stripe.com/
Fonts: Base64 Encoder File To Base64 Encoder | Convert any file | GiftOfSpeed
Fonts: Create Font from SVG (Glyphter) https://glyphter.com/
Fonts: DMS “Highway Gothic” Highway Gothic Font | dafont.com
Fonts: Font Squirrel http://www.fontsquirrel.com/fontface/generator
Fonts: Font Subsetter Font Subsetter
Fonts: FontSpace http://www.fontspace.com/
Fonts: modulator | metaflop modulator | metaflop
Fonts: Orchard Title “Oregon” Oregon LDO Font | Luke Owens | FontSpace
Fonts: Proxima Nova http://www.thewildblogger.com/2014/05/download-proximanova-museo-slab500-free.html
Fonts: Web Font Generator (like FontSquirrel | Use base64) https://web-fontgenerator.com/
Fonts: WOFF Font Converter https://andrewsun.com/projects/woffjs/woffer-wofffont-converter/
Graphics: Compressor.io | Compress SVGs Compressor.io - optimize and compress JPEG photos and PNG images
Graphics: Delaunay Triangulations http://labs.vieron.net/delaunay-triangulations/
Graphics: DPI love Find the DPI/PPI http://dpi.lv/
Graphics: Hero Patterns (SVGs) http://www.heropatterns.com/
Graphics: SVGOMG - Clean SVG SVGOMG - SVGO's Missing GUI
Graphics: SVG Tools 20 Free SVG Tools for Better Graphics (Updated) - Hongkiat
Graphics: Trianglify Vector Generator Trianglify.io · Low Poly Pattern Generator
Graphics: Triangulate Images - Low Poly Image Triangulation
How-to: Markdown Syntax Simplpost Markdown Syntax Guide and Examples
Icons: Captain Icon - Hand Drawn Style Captain Icon
Icons: Font Awesome https://fortawesome.github.com/Font-Awesome/
Icons: flaticon http://www.flaticon.com/
Icons: Entypo http://www.entypo.com/
Icons: Free Vector Icons http://vectoricons.org/
Icons: IcoMoon App IcoMoon App - Icon Font, SVG, PDF & PNG Generator
Icons: iconmelon http://iconmelon.com/
Icons: iconmonstr http://iconmonstr.com/
Icons: ionicons http://ionicons.com/
Icons: Icon Converter http://iconverticons.com/online/)
Icons: Nasty Icons http://www.nastyicons.com/
Icons: Favicon Generator http://realfavicongenerator.net
Icons: Favicon Generator, X-Icon http://www.xiconeditor.com/
Icons: IKONS - 300 Free Vector Icons http://ikons.piotrkwiatkowski.co.uk/
Icons: Typicons - Like FontAwesome http://www.typicons.com/more/how-to-usetypicons/
Miscellaneous: A Log List with Various Resource Types
Patterns: Subtle Patterns http://subtlepatterns.com/
SEO: Google AdWords Keyword Planner Google Ads - Get More Customers & Generate Leads with Online Ads
SEO: Headline Analyzer Write Better Headlines: Headline Analyzer From CoSchedule
SEO: Keyword Density Analyzer Tool http://tools.seobook.com/general/keyworddensity/
SEO: Keyword Tool http://keywordtool.io/
SEO: Nibbler http://nibbler.silktide.com/
SEO: SEMrush https://www.semrush.com/
SEO: SimilarWeb http://www.similarweb.com/
SEO: Ubersuggest http://ubersuggest.org/
SEO: Varvy Tools for Google Webmaster Guidelines Google core web vitals - Full Service Internet Marketing Company & Internet Marketing Tools
SEO: Website Speed Test Website Speed Test | Pingdom Tools
Software: ImageOptim (Compression) http://imageoptim.com/
Software: MAMP Local Server http://www.mamp.info/en/index.html
Software: AMPPS Local Server (Free) http://www.ampps.com
Stock Images: Design Shock (Vectors) http://www.designshock.com/
Stock Images: FindA.Photo http://finda.photo/
Stock Images: Gratisography http://www.gratisography.com/
Stock Images: List of Free Resources http://blog.bufferapp.com/free-imagesources-list
Stock Images: Makerbook http://makerbook.net/
Stock Images: NASA Galleries NASA Images | NASA
Stock Images: New Old Stock http://nos.twnsnd.co/
Stock Images: New York Public Library http://digitalcollections.nypl.org/
Stock Images: Pexels http://www.pexels.com/
Stock Images: photodune http://photodune.net/
Stock Images: picjumbo https://picjumbo.com/
Stock Images: Pixabay https://pixabay.com/
Stock Images: Pixeden http://www.pixeden.com/
Stock Images: Unsplash https://unsplash.com/
Stock Videos: coverr (Free Videos) http://www.coverr.co/