Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Creative Market - Buy and sell handcrafted, mousemade design content like vector patterns, icons, photoshop brushes, fonts and more at Creative Market.
Sketch - Professional digital design for Mac.
SocialSizes - Sketch templates for sharing images & videos on social media
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Headers.me - Create social cover images that get you followers