I'm putting this list here, so I can refer back to it later when I'm looking for ideas for a project.
- PCA9555N 16-bit I2C-bus and SMBus I/O port with interrupt
- DS1077 Programmable Oscillator
- 74HC238 3-to-8 line decoder/demultiplexer
- 74HC595 8-bit serial-in, serial or parallel-out shift register with output latches
- TLC5940 16 channel LED driver (i.e. 16 channel PWM unit with 12 bit duty cycle control (0 - 4095), 6 bit current limit control (0 - 63), and daisy chainable serial interface)
- AD5206 6-Channel, 256-Position Digital Potentiometer