alah:
BTW, Ive searched internet for software to build an 8 x 8 unicolor LED Matrix but all come down to RGB and special panels and modules; Any idea?
The most basic method, not using any of the myriad of IC, is to drive the 8 sources with PNP transistors, taking them low to turn them on, and drive the 8 sinks with NPN transistors, taking them high to turn them on. Don't forget your current limiting resistors.
There are various IC, collectively labeled LED Display Drivers, that attach the 8x8 matrix to a bus on the micro, usually SPI, I2C, MC6800 etc.