It’s a video of a real kitten playing with an exasperated cartoon mouse in a really fun and unique screensaver.

Download is 100% Spyware and Adware Free. For Windows or Macintosh

Link: Screensaver Cat and Mouse

Free Clock Screensaver

Office Clock-7, a good freeware screen saver that displays the current time.

It's possibile to change colors of: background, dial, ring, numbers, dots, arrows (seconds, minutes, hours), shadow. Also you can select any font installed on your computer for show numbers, choose size of clock, method of show seconds (off, normal, full back) and shadow (on, off).

Compatible: Windows Xp, Windows Vista. Light download: 334 Kbytes.

It not contains virus or spyware.

Link: download free Clock Screensaver.

Halloween is Coming, Free Screensaver

Halloween is coming. Many people have already thought about how their Jack-o-Lantern would look like this time. All ghosts visualize this night. Has chillness, preceding horror, already touched you spin?

Features:

    * Beautiful high-quality images
    * Pumpkin is on your screen

System Requirements:

    * Pentium II or higher
    * 16 Mb Video Memory
    * OpenGL-compatible video card
    * Windows 95/98/ME/2000/XP/Vista

Download 2,7 Mbytes.

Link: download Halloween Screensaver

Free Matrix Screensaver

Matrix screen saver: very cool! It uses the authentic Matrix font from The Matrix movie. It includes a lot of custom options, see below for details.

Features:

# It's unique because it uses the actual matrix characters, no look-a-likes.
# Includes automatic support for single, dual, tri, and quad monitor configurations! You don't have to do anything, it will recognize your other monitors automatically.
# You can choose color schemes! If you're tired of the lime green matrix animation, you can now choose red, yellow, white, blue, gold, pink, or even rotate each of them! You can also specify how often to rotate them.
# Includes option to display an image within the Matrix - choose any jpg, set the location and transparency of the window!
# Includes (optional) user and system information displayed at the top of the screen.
# Includes option to display text from a text file (instead of user/system info).
# Includes an option mini-slideshow of images - displaying on a small CRT in the matrix. Cool! You choose a local image directory (supports bmp, gif, jpg, etc.), and it randomly displays the images (smart-sized for the small monitor they're shown in). Here are a few screenshots: pic 1,   pic 2. To find some good images, visit the official Matrix site. To get the best animation effect with this feature, use images at least around 400 pixels wide. :)
# Includes options to play your favorite MP3 files while the screensaver plays. You can download this sample music text file (playlist file) which shows the format needed. The text file MUST be in the same folder as the screensaver.
Here are simple instructions:

    * Save the sample file above to your local system.
    * Edit the sample playlist file and put the path of your MP3 instead of mine.
    * Drop it into your C:\windows\system folder (for example).
    * Go to the screensaver settings and under the Music tab, browse and select the C:\windows\system\Matrix-ks.txt file.

For Windows 95, 98, ME, NT, Win2k, XP, Vista

Link: Free Matrix Screensaver