This is a collection of websites to go to when you're looking for web fonts.
Lost Type Coop
With Typewonder you can preview web fonts on your website on the fly.
PX to EM Converter
em and vice versa.
An overview of HTML code, hexadecimal code and HTML entity for ASCII characters.
Patternlab is a collection of tools to help you create atomic design systems.
A lightweight mixin library for SASS.
And CSS preprocessors, bringing your CSS to the next level with functions, mixins and variables.
§Icons & Images
Here are some great resources for free stock images, icons, placeholders and more.
1001 Free Downloads
The Noun Project
These sites help you out with placeholders:
These are the best websites for free stock photography:
This page lets you generate all the files needed to make your website/logo look great on all devices.
A detailed cheat sheet about favicons.
These are some tools I often use for inspiration when I need to create a new color scheme.
Adobe Color CC
Some helpful tools to make your website faster.
Google Pagespeed Insights
You can improve your SEO by using the following tools.
With these tools you can test if your responsive website really works on all devices and screen sizes.