Complex sentence: While many of the early efforts remained command-line based, the first podcasting client with a user interface was iPodderX (now called Transistr), developed by August Trometer and Ray Slakinski and released first for the Mac, then for the PC.
Split into simpler sentences: While many of the early efforts remained command-line based, the very first podcasting client with a user interface was iPodderX (now called Transistr), developed by August Trometer and Ray Slakinski. It was released first for the Mac, then for the PC.