CSSGram
Do you, like many, enjoy those popular Instagram filters? If the answer is yes, you’ll definitely enjoy CSSGram, a library that replicates Instagram’s filters in pure CSS.
Download & Info
HUE.css
There was a time when most websites were using a huge image as a background, which caused sites to be slow and poorly optimized. Thanks to CSS3, this whole technique is now mostly obsolete.
HUE.css is a huge pack of 49 photorealistic gradients that you can use as content backdrops in any part of your website.
Download & Info
iHover
iHover is an impressive hover effects library (20+ different effects) powered by pure CSS3. Great news, its work well with Bootstrap 3!
Download & Info
CSS Image Hover Effects
An extensive article featuring the most common CSS image hover effects, that you can simply try, copy, and paste on your own website.
Download & Info
CSSCO
Like CSSGram, CSSCO is a library featuring many beautiful filters for your images. It’s free, easy to use and the filters are particularly beautiful, so you should give it a try if you haven’t yet!
Download & Info
Center and crop thumbnails with CSS
A handy CSS centering technique to center and crop irregularly sized thumbnails within a square container. Super useful technique to learn and use in various projects.
Download & Info
Clippy
Clippy is a free online tool that lets you clip images visually, and get the CSS code to use on your projects. Over 25 shapes are available.
Download & Info
Colofilter.css
Colofilter is a small CSS library that allows you to create beautiful duotone images. A great way to unleash your creativity when designing a new site.
Download & Info
CSS Filter
A super handy tool which allows you to display a picture of your choice, play around with CSS filters and export the related code.
Download & Info
Sassy Filters
I’ve recently listed using SASS as a good practice for writing maintenable CSS. If you adopted this efficient preprocessor, Sassy Filters is for you: a set of cross-browser configurable CSS-SVG filters designed to be used with Sass.
Download & Info