My personal favourites are:
Buffer
Hootsuite
Friends +me
My rule of thumb is that I post the same message and image to FB & G+
Twitter needs to be shortened of course
Pinterest needs it’s own image in a much biggers size and style, and slightly different copy but can be posted from the paid version of buffer etc
Source: https://sites.google.com/site/onlinetoolsmakewebsiteperfect
