A website that provides 600,000 vector icons, which are organized into 110,000 combination packages. You can download them individually or as a combination package, such as pen-related icons, technology-related icons, and lab icons. No registration is required to download, but there is a daily limit of 50 icons for free downloads. Paid membership removes the download limit and allows access to some icons that are only available for paid members. Be sure to check the official website for copyright information on specific icons.