- A variety of online software along the way (most already mentioned here, nothing cheap or good enough for the long haul) - Dia - Microsoft Visio (when avail

- A variety of online software along the way (most already mentioned here, nothing cheap or good enough for the long haul) - Dia - Microsoft Visio (when available, makes nicer diagrams than above, but sucks at anything software modeling related) - Enterprise Architect is supposedly the standard for the enterprise corp I work for.