Planets are randomly generated, so in one game you can have Alpha Centauri with several habitable worlds and in another it will have no planets.
In my current game 36 Ophiuchi (trinary star system with 3 K type stars) has some 30 planets and over 200 moons and some 250 asteroids, four planets are bellow 2 colony cost and one is 2.4. Six more are bellow 4 colony cost with ice sheets and relatively small sizes, so good terraforming targets.
G and K stars are usually good candidates for low colony cost worlds.
From those close to the Sol and having multiple stars are Alpha Centauri, 61 Cygni, 70 Ophiuchi and 36 Ophiuchi.