Faster, cheaper, smaller, better, right? The SN754410 Quad Half H-Bridge is just that. Capable of driving high voltage motors using TTL 5V logic levels, the SN754410 can drive 4.5V up to 36V at 1A continuous output current! Please see datasheet for more information.

This is a common 555 timer/oscillator from TI. 

The LN298 is a high voltage, high current, dual full-bridge motor driver designed to  accept standard TTL logic levels and drive inductive loads such as relays, solenoids, DC and stepping motors.

The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.