Spectro Signal Generator you with the ability to generate a variety of static and sweep signals using your PC sound card. The signals that can be generated includes: sine, triangle, square, sawtooth and white noise.

Amplitude and offset can also be adjusted. A linear, exponential and logarithmic sweep signal can be specified within a specific frequency range and time duration. The sweep frequency can be adjusted to increase or decrease in frequency.

Sampling rates of 8 kHz up to of 44.1 kHz; and 8 and 16 bit are support. The time history and frequency spectrum of the generated signal are displayed in graphical format.

You can try Spectro Signal Generator and see what it's really capable of.