(There's no video for PowerScan yet. Please contribute to MR and add a video now!)
PowerScan is a simple port and range scanner made with what looks like RealBasic.
PowerScan.sit (576.75 KiB / 590.59 KB)
PowerScan v1.0 / compressed w/ Stuffit
At least 5.3MB of free RAM
Mac OS 9.x - Mac OS X
Emulating this? It should run fine under: QEMU