Airscanner Mobile Firewall
Airscanner Mobile Firewall for Windows Mobile Pocket PC is a low-level, bi-directional, packet filtering firewall that examines all incoming and outgoing TCP/IP traffic. This personal firewall ensures that data is permitted based on access control lists that you select from a set of predefined filters, or from filters that you create yourself.

IECleaner
After you use your Pocket Internet Explorer for a while, the documents and URLs that you have accessed are cached in PDA's RAM or flashcard. IECleaner helps to remove those temporary file in a single click! It detects your PIE setting automatically.

MyIpConfig
MyIpConfig is a simple utility for PocketPC, which is inspired by WinIPCfg utility from Windows 9x times. MyIpConfig runs on PocketPC 3.0 and probably other Windows CE platforms and shows current IP configuration for multiple network adapters.

PocketPing
When Microsoft ships its PocketPC to the world, IP utility "PING.EXE" is not included. Is that because they thought PDA will not likely be connected to Internet or with each other? PocketPing is a freeware to let you check the ping statistics.

WiFiFoFum
WiFiFoFum is a 802.11 scanner designed for PDAs running PocketPC 2003. It scans all 802.11 access points in range and offers a list and a radar to view. It also offers GPS features to record the location of the access points. The list can be saved to file. To install just copy the files in the zip to a folder on your device.