Remember, all content is free for personal use. Please check their individual licences if you want to use them for commercial purposes.
How to use these files
Vector graphics (.ai, .eps, .svg files) will require vector editing software like Adobe Illustrator or InkScape. Download InkScape for free.
Photoshop files (.psd) will require Adobe Photoshop or similar image editing software. GIMP is a free image processor which can handle certain .psd files. Download GIMP at www.gimp.org.
Fonts can be installed on just about any computer.