Pic type microcontrollers from Microchip can source/sink 20 mA per pin (not all at the same time) that is >= 250ohm relay coil. If you common one connection of all the relays and if you don't have to switch more than one relay at a time, you could take advantage of the tri-state condition of the pins. With couple of transistors, you connect the "relay common" connection to + or - and switch the micro's pin from high impedance to high or low, depending on the operation required.