• http://icons8.com/ – 55,300 free icons. Yes, you've heard it. They're free and although it comes with some size and copyright restrictions.
• https://iconpharm.com/ – 9,900 free icons. This one allows you to do multiple edits to icons before downloading them.
• http://creativedo.co/FontAwesomePS – Fontawesome plugin right inside your photoshop, vector .svg format.
• http://www.flaticon.com/ – A really good web-based archive for icons.
• https://material.io/icons/ – A pretty nice collection of material design icons from google.
• https://thenounproject.com/ – A really rad collection of icon sets for all kinds of design.
• https://mariodelvalle.github.io/CaptainIconWeb/ – A single author created 350+ resizeable icons for your use.

PATTERNS

• https://www.toptal.com/designers/subtlepatterns/ – It's an awesome site to get clean patterns from.
• http://thepatternlibrary.com – THIS WEBSITE IS AMAZING. Seamless patterns. Just. Amazing.

STOCK PHOTOS

• https://unsplash.com/ – Unbelievably HD, beautiful, free photos that you can use.
• https://stocksnap.io/ – A nice collection of HD stock photos all under CC0 license.
• http://nos.twnsnd.co/ – This one is really cool, it's basically a site dedicated to vintage-type photos, of course, you can use the stocks as well.
• https://pixabay.com/ – Don't you just love the CC0 license?
• https://www.foodiesfeed.com/ – YOOOO. DESIGN + FOOD. No seriously, this is a lot like food porn. There's a lot of HD food goodies in here.
• https://uifaces.co/ – A very useful website where you can basically get photos to use for mock avatars on any 
• https://www.photobash.org/ – More royalty free stock photos!

• http://www.renders-graphiques.fr/galerie.htm – Mostly anime-related renders.
• http://www.stickpng.com/ – A collection of renders for things like games, animes, memes, musicians, etc. 

• http://www.freepik.com/ – They have an unbelievable amount of free vectors you can utilize. 
• http://vecteezy.com/ – Also another free vector archive, though a little more limited than freepik.
• https://undraw.co/illustrations – Amazing crazy find, this website lets you use .svg vector illustrations.
• https://worldvectorlogo.com/ – A collection of famous logos for different brands/companies around the world in .svg format!

• https://webcreme.com – Design inspiration for the mock-up idea hungry designers.
• http://littlebigdetails.com/ – For your daily dose of design inspiration.
• https://niice.co/ – Just a lot of designs for every category you may be able to think of.
• https://www.awwwards.com/ – Best webdesign trends, they're sort of like the grammys for music, except it's webdesign. 
• https://logopond.com/ – A collection of really amazing logos to take inspiration from.

• https://webkul.github.io/coolhue/ – Another resource to grab ideas of cool gradient combinations from.
• http://www.sankk.in/material-mixer/ – Quite useful for mixing and matching colours for material design, ui/ux. 
• http://paletton.com/ – If you were running out of ideas for color combinations, this one really can save you.
• https://pigment.shapefactory.co/ – A wonderful looking resource website for picking colors. Palettes are contrast-friendly.
• https://coolors.co/ – Another awesome website where you can generate color palettes.

• https://www.grabient.com/ – Grab a gradient, grabient. Get it? No?… Okay…
• https://uigradients.com – A very cool looking website for gradients.

• https://fonts.google.com/ – Honestly if you didn't know you could get amazing free fonts from this website, I'm sort of judging you a little.
• http://www.dafont.com/ – ALL DA FREE FONTS. See what I did there?

• https://designbundles.net/free-design-resources – Basically a collection of random resource packs.
• https://freebiesbug.com/ – A site pretty much dedicated to giving out free design resources.
• http://flypixel.com/ – Has a lot of free design mock-ups and flat designs. 
• http://graphicburger.com/ – A lot like freebiesbug and flypixel.
• http://dbfreebies.co/ – A lot of the freebies from dribble and behance categorized into one website.
• https://medialoot.com/ – Has a lot of nice icon sets and different other resource collections such as .psds, etc.

• https://vgy.me – I personally use this imageuploader, it's lovely and all around neat.
• https://uploadfiles.io/ – I personally use this file uploader to upload heavy files such as .psds for clients.
• https://placeit.net/ – It's a pretty cool website to place/edit any type of image into someone's hand using mobile devices. 
• https://rapidgrab.net/ – I haven't personally used this website, but it looks like a good alternative for vgy.me.