While marketed for LEDs, it is equally popular as a servo driver.
You can daisy-chain up to 62 boards together to control a massive 992 LEDs using the same two pins. 16 Channel Led Driver Arduino
This is the most modern and "resource-friendly" choice for most Arduino users. It communicates over just two pins (SDA/SCL) and has its own internal clock, meaning it handles the PWM signals without taxing your Arduino's processor. While marketed for LEDs, it is equally popular
Very affordable, with modules typically ranging from $3 to $16 depending on the brand. You can find them at retailers like AliExpress or Sears. Best for Precision: TLC5940 SPI Driver It communicates over just two pins (SDA/SCL) and
Offers 12-bit resolution (4,096 brightness steps), providing much smoother fading than the Arduino's native 8-bit pins.
CANADUINO 16-Channel 12-bit PWM/Servo Driver - I2C Interface - PCA9685