Mathematics and Physics

calculator.com    
Great selection of miscellaneous calculators - no acoustics, though

---

CDML    
Great Windows 95/98/NT shareware calculator - all scientific functions, optional RPN notation

---

Dan Russel's Page    
Acoustics and Vibration Animations

---

hp41.org    
Free Emulator of the classic HP41 calculator - neat

---

Mathtools - MATLAB files etc.    
The scientific portal for MATLAB files, toolboxes, links and resources

---

The MathWorks    
Developers of MATLAB technical computing software for engineering and science

---

Mathtype    
Mathematical Equation Editor to be embedded into Mac and Windows based office software

---

Multimedia Physics Course    
Very nice Physics tutorial with lots of cute animations

---

Windows 95/98 Mathematical Graphing Tools    
Large selection of freeware/shareware graphing tools

---