Do IC's in DIP sockets require an extraction tool?
Yes, you can use an extraction tool for removing ICs from DIP sockets (you can get them for PLCCs too) but something like a screwdriver wiggled underneath gently at both ends works fine. 

The main thing to avoid is lifting one end up too high and bending the pins, so you lift one side a mm or two, do the same with the other, etc until both ends are raised flat and the chip can be lifted easily from the socket.