I posted a previous detailed review on my blog post earlier this year in April. This is an updated list to reflect updated apps and how I actually use these apps in my daily work. These are based on a review of over 100 network apps purchased and tested over the last few months.
Try them yourselves - I think you'll enjoy using your iPhone as a nice portable network analysis tool.
If you want to see the full 100+ apps, icons, pricing and features. Drop me an e-mail at KEITH at INPNET dot ORG and I'll send you the spreadsheet in Excel and PDF form for your review.
Tier One Apps
NetBrowser - does Multicast DNS searches (Bonjour) with nice details
Bytes - does dec/hex/bin conversions, ASCII reference and metric units
My System 2 - gives you System information as well as Local station info
ASCII Chart - the best of the many ASCII reference apps
My Network Ports On-The-Go - detailed analysis fo the port database
Pinouts - Details on RJ-45, Firewire, USB, etc.
Emerald Time - NTP Accurate time
iNet - Professional robust network tool with Scan, Bonjour, Portscan & Device Info
Net Scan - Scan IP, Range, Country, MAC, Whois, ICMP, TCP
Network Diagnostics Pro - Ping, Ping Range, Tracert, DNS, Device Info
Snap - Local Scan, ID Devices, Bonjour Services, detailed export
Net Status - Professional TCP, UDP update and MAC Lookup
Nice Trace - Professional Trace, Whois, Country and Details
TCPinger - Both ICMP and TCP Ping with details and 'What's Up'
RF Toolbox - Very well done RF, GPS and Site tools for Wireless Pros
IP Calc - the best of the myriad of Subnet calculators
iPico SIP Client - a fully configurable and robust SIP Client
Skype Client - yep - just what you think
WiFiFoFum - best 'NetStumbler' around for iPhone - Get it!
FTP On The Go - FTP App with Viewer capability
Tier Two Apps
DNS-SD - $2.99 - Browse Bonjour Services
nDNS Watch - $0.00 - Browse Multicast DNS Services
Network Solutions Whois - $0.00
iNetCalc - $0.99 - Calculate file transfers, bandwidth, VoIP
SpeedCalc - $0.00 - Calculate file transfer times
iNetInfo - $0.00 - Quick MAC, IP, Gateway, DNS
File Name Extension Reference - $0.00 - Yep, just hat is sounds like
iHexView - $0.99 - Base converter for bin/dec/oct/hex
IT Tools - $2.00 - Ping, Route, Interface, ARP, MAC Database
IP Port LIst - $0.99 - Reference Tool for IANA Ports
RF Calc - $0.00 - CWNP RF Calculators from G.T. Hill
IP Calc - $0.99 - Best Simple IPv4 Subnet Calculator
IPEToolbox - $0.99 - IP Engineer's Toolbox with Subnet, VoIP bandwidth
NetCalc - $0.00 - Easy to use Subnet calculator
The Mask - $9.99 - Professional Extensive IPv4, BinHexDec, VLSM, CIDR
Acrobits Softphone - $6.99 - Customizable SIP Soft Phone with easy setup
WiFiTrak - $0.99 - WiFi Scanner with Connect
Datacase - $6.99 - WiFi Drive Apps with Viewers
iDisk Mobile Me - $0.00 = Access your Mobile Me iDisk