ColorHub

This website is not recommended for free image library as it has limited registration options and limited download quota for new users. However, it does support Chinese search and has over 100,000 images, including many works from museums. Each image has its main colors labeled with a color palette, making it easy to search for images by color. However, it only allows registration through Weibo, QQ, and Github, and new users can only download three images. Additional download quota can only be obtained through recharging or by recommending others to register.

 

Mixkit Art

The Mixkit Art is one of the Mixkit website's projects, featuring a collection of illustrations in various categories such as animals, food, nature, family, and moods. Most of the images have simple, clean designs and color schemes. All illustrations on the website can be downloaded for free and used for both personal and commercial purposes, mostly in PNG format.

(USDA) Pomological Watercolor Collection

The museum database collects over 7,000 watercolor paintings of fruit, with high resolution images. They mainly come from 1886 to 1942, when the US Department of Agriculture commissioned painters to create paintings of fruits from around the world based on what they saw at the time. You can search for fruit paintings by clicking on the "Search" button at the top. Please note that when using these images, the source must be credited as "U.S. Department of Agriculture Pomological Watercolor Collection. Rare and Special Collections, National Agricultural Library, Beltsville."

 

Free Food Stock Images

A website created by two photographers that focuses on providing a free stock of food photography, including bread and grains, candy desserts, meats and seafood, vegetables and fruits, snacks, and holiday foods. No registration is required to download, and they are released under CC BY 3.0 license, which can be used for personal or commercial purposes, but requires attribution to the source.

 

Free to Use and Reuse Sets

The website offers free access to a collection of old photographs, posters, and films from the Library of Congress in the United States. These works are in the public domain and can be used for commercial purposes. The collection includes propaganda posters from World War II, children's books, illustrations, and restaurant advertisements, among others. Users can download these materials without registering.

 

jeshoots

This website, created by Jan Vasek, features photographs taken by him personally, providing a unique and original collection. All photos can be downloaded for free and used for commercial purposes as well. Since the photos are taken by the website creator himself, there is a lower likelihood of encountering duplicates used by others. Additionally, no registration is required for downloading.

 

Frrames

This is a website that provides browser (Chrome, Firefox, Safari, Opera) and application frame vector graphics, even including mobile device frames such as iOS and Android, which can be directly applied in Sketch, Adobe XD, Figma and other UI/UX editing software to make screenshot scenarios more high-quality. If you don't want to download, you can pay a small amount to purchase all the materials, which can save you some time.

 

Slidesgo

There are many high-quality PowerPoint presentation templates available for free download, which can be used for personal or commercial use. No registration is required. The templates are categorized as the latest, popular, education, business, marketing, medical, etc... After downloading, you can edit them directly with PowerPoint or Keynote.