They are available both in .PSD + .AI (.EPS) format in single layered files and free for personal and commercial projects.
Many of the icons have a second design option, and any cloud-based icons have three states: plain, day and night giving you more options than you can shake a stick at.
You may be interested in the following modern trends related articles as well.
Icons are the basic requirement of any web related projects and good icons are like a treasure for web designers. If you are looking for that perfect icon for your web site, blog, web app or application, you will find them here.
The icon set release by Climacons completely free for commercial and non-commercial usage. You cannot, however, modify these icons, claim them to be your own, redistribute these icons on another website and/or sell them for a profit. You should include a link to this page in your credits.
Download the zip file with all icons follow the link below: