Star Scape is what could be called a primitive interactive screensaver for early B&W Macs.  When you press the mouse button, it "warps" at light speed.  Else, it displays stars field animation in the direction of your mouse...

Stars is just a stars field animation screensaver for early B&W Macs.  There doesn't seem to be ANYTHING else than the stars moving and clicking or pressing anything immediately quits.  

Gain quick access to your screen savers by means of the Dock.

Setting Sun is a modern application based screen saver, which uses plug-ins to draw interesting images when your computer is idle. Although not strictly necessary (since most monitors can turn themselves off automatically), it still provides a nice...

Screen Gear Pro is a screen saver and a simple presentation tool. Screen Gear Pro will take a folder full of AIFF, PICT, JPEG and QuickTime files and turn them into an elegant slide show, fading one file into the next while playing narration, music...

StonerView is a screensaver app that looks very much like ElectroPaint for SGI machines.  It animates 3D particles in the form of cards flying in all sorts of fashion.   

Sleeper gives desktop Macintoshes two "sleep" features found in portable Macs: Hard disks will spin down after a given amount of inactivity The screen can be dimmed after a set amount of idle time Sleeper's hot key also...

This app works with: SheepShaver, Mini vMac The program draws pseudo random interactive patterns on the screen. It can be used as a quite beautiful screensaver.