WordPress - WordPress is web software you can use to create a beautiful website or blog. We like to say that WordPress is both free and priceless at the same time.
GuideGuide - GuideGuide is the Photoshop and Illustrator panel that makes working with guides.
ApostropheCMS - Apostrophe is a powerful website builder platform built on an enterprise open source CMS, offering in-context live editing, visual design tools, and multisite enablement in a full stack JS environment.
phpAlbum - phpAlbum.net is an Open Source PHP script which allows creating personal Photo Album / Gallery
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.