IC Sn74lvc257apwr/LC257A Data Selector/Multiplexer with 3 State Output Tssop-16, Terminal System, Motor, Server, Switch - China Integrated Circuit, IC | Made-in-China.com
Product Selector | Atmel | Bits & Pieces
Proteus VSM Software for Atmel AVR Microprocessor - RobotShop
ATMEGA328P-AU Microchip Technology | Mouser
PIC microcontrollers - Wikipedia
Comparison of single-board microcontrollers - Wikipedia