Fonts Ninja - Try fonts discovered on websites in any design software
Font Viewer - Font Viewer is an application which does exactly that - it views fonts!
What Font Is - Find any font from any image (commercial or free)
NexusFont - Choose and manage your fonts with Nexus Font.
Adobe Capture - Turn any photo into a color theme, Look, vector graphic, or unique brush that you can use in your creative projects with Adobe Capture.
Font Manager - Simple font management for GTK+ desktop environments