Starting from top left:
TCP/IP Control Panel, Aladdin (Stuffit) Expander, ?, Window Monkey, Zipple, Adobe Anti-Aliasing
?, ?, ?, PC Exchange, ?, ?, ?, FreePPP Menu, ?, Sleeper, Mosaic Screen Saver?, ?, ?, Speech Control Panel, Speed Doubler Control Panel
AfterDark, ControlStrip, Date & Time, ?, ?, ?, Kaleidoscope, ?, ?, Memory Control Panel, ?, ?, ?, ?, ?
Microsoft OLE, ?, Printer Sharing, (next 4) QuickTime, ?, ?, Sound Manager, ?, Speech Extension, ?, ?, ?
AppleShare, Custom Mouse Cursor, Some Mouse utility?, Color Picker, Decor Wallpaper Extension, File Sharing, ?, AppleScript Extension?, ?, ?, ?, ?, Iomega, ?, Debugging Extension
Speed Doubler Extension, ?, ?, ?, ?, ?, TechToolPro Extension, ?, AntiVirus extension?, ?, AOL IM, Apple CD, AppleGuide, ?, AppleScript
Details:
Window Monkey: Let you set backgrounds inside folder, no more plain white windows! (Each folder can be set it it's own background.)
Zipple: Lets you change the Apple menu icon, including animated icons.
Speed Doubler: Suppose to help improve boot times through caching I think?
After Dark: Popular Screensaver
Kaleidoscope: Lets you change the theme of the windows and menu bar.
Custom Mouse Cursor: (The blue one) Someone with pixel skills made a custom cursor extension. My brothers and I used to use ResEdit to make our own. (Still have them too!)
Decor Wallpaper Extension: Decor was a wallpaper manager.