• GlyphWalker lets you walk simultaneously back and forth through all open fonts while showing the current glyph.
use buttons: < and >
• change display settings for all glyph windows (like outline/points/blues etc.)
• zoom in and out (buttons: + and -)
• arrange/open Current Glyph window for all open fonts (button "open current (all")
• Font Bureau's .ufo overlay can be a nice addition when walking through the glyphs (see last screenshot)