Resources

Bucknell’s Music and Sound Resources: Bucknell students have access to a vast store of background music and sound that they can pay without licensing fees.
Bucknell’s Video Resources: Similarly, Bucknell students have access to copyright- and royalty-free stock video footage.
Subtle Patterns: a great collection of unobtrusive background patterns for a website.
icons8: huge collection of icons.
Noun Project: enormous collection of well-designed icons. Many are free (at least with attribution).
Flat Icon: sets of icons with visually consistent design
FindA.Photo: search engine for free stock photos that includes search-by-color
Pexels: high quality free stock photos that you can use

Web Typography Resources: “A growing list of web typography related apps, tools, plugins and other resources for web designers and web developers.”
Fontpair: collection of fonts that go well together.
Beautiful Web Type: showcases the most beautiful fonts from Google’s free WebFonts collection

Adobe Color: interactive web app to help you choose nice color schemes.
Colour Lovers: a community of people who post and vote on color palettes.
Colorgorical: research-driven model to help you create color palettes that are both aesthetically pleasing and optimized for communicating data.
Color Oracle: a free color blindness simulator for Windows, Mac, and Linux
LOLColors: curated color palette inspiration
Color Contrast Checker: determines whether a foreground/background color combination provides enough contrast for the purposes of accessibility
Viz Palette: Demonstration of various color palettes for data visualization (includes accessibility toggles).

How we really use the Web (from “Don’t Make Me Think”): what do people look for when they read online?
How Users Read on the Web (Jakob Nielson): concrete tips about how to improve readability/engagement
Voice And Tone: best practices for the writing in your app - how do you create a clear, appropriate voice?

inVision: create prototypes for web or mobile. Lots of integrations.
Marvel: create desktop and mobile prototypes. Integrates with Sketch. Nice free plan.
Facebook Design Resources: a set of images and tools curated by Facebook to be used during UI prototyping.
Adobe XD: Far from free, but if you have access to an Adobe account, a wonderful app for prototyping.
Sketch: Mac OS X app to help you draw new designs. Free trial or $50 student license.

Android Design Guide: design guidelines and patterns that are consistent with the android experience.
iOS Design Guide: design guidelines and patterns that are consistent with the iOS experience.

Dribbble: showcase of what designers are working on
Awwwards: awards for design, creativity, and innovation on the internet
Niice: sort of a more design focused pinterest site that can be used to create moodboards (and explore ones created by other people).
muzli designers: browse the work by a number of designers
From Up North: trendy, curated design inspiration.

Google Design Resources: big repository of all kinds of design resources from Google
How to Conduct a Heuristic Evaluation: a quick and dirty set of guidelines to think about when creating a user interfaces
Design Methods (by Amy Ko)
Clean Up Your Mess: A Guide to Visual Design for Everyone: a good, quick ‘how-to’ guide for visual design