The Image Gallery is provided as a complimentary
source of high quality digital photographs available from the Agricultural
Research Service Information Staff.
Oldie but a decent one from the government for images and pictures. Remember that with most government sites you are free to use the pictures but some such as NASA do require that you cite the source.
# Fix your photos in just one click
# Use advanced controls to fine-tune your results
# Crop, resize, and rotate in real-time
# Tons of special effects, from artsy to fun
# Astoundingly fast, right in your browser
# Awesome fonts and top-quality type tool
# Basketfuls of shapes from hand-picked designers
# Works on Mac, Windows, and Linux
# No download required, nothing to install