Freeware - Net

The Dude

Freeware

Scans and finds all devices on subnets, draws a network map, monitors devices, and issues warnings when problems occur.

WifiInfoView

Freeware

WifiInfoView scans the wireless networks in your area and displays extensive information about them, including: Network Name (SSID), MAC Address, PHY Type (802.11g or 802.11n), RSSI, Signal Quality, Frequency, Channel Number, Maximum Speed, Company Name, Router Model and Router Name (Only for routers that provides this information), and more...

When you select a wireless network in the upper pane of this tool, the lower pane displays the Wi-Fi information elements received from this device, in hexadecimal format.

WifiInfoView also has a summary mode, which displays a summary of all detected wireless networks, grouped by channel number, company that manufactured the router, PHY type, or the maximum speed.

Wireless Network Watcher

Freeware

Wireless Network Watcher doesn't require any installation process or additional dll files. In order to start using it, simply extract the executable file (WNetWatcher.exe) from the zip file, and run it.

After running WNetWatcher, it automatically locates your wireless adapter, and scans your network. After a few seconds, you should start see the list of computers that are currently connected to your network.

Intra

Intra protects you from DNS manipulation, a type of cyber attack used to block access to news sites, social media platforms, and messaging apps. Intra also helps protect you against some phishing and malware attacks. It’s easy for anyone to use — just download the app and get started in a few seconds. You can leave it on and forget about it.

While Intra protects you against DNS manipulation, there are other, more complicated blocking techniques and attacks that Intra doesn't protect against.

Features

1. Free access to websites and apps blocked by DNS manipulation
2. No limits on data usage and it won’t slow down your internet connection
3. Open source
4. Keep your information private - Intra doesn’t track the apps you use or websites you visit
5. Customize your DNS server provider — use your own or pick from popular providers

Wireshark Portable

OpenSource

Ethernet network traffic analyzer.

We monitor all traffic network in real time, translating the network card into a broadcast mode.

Supported protocols: DNS, FDDI, ftp, HTTP, ICQ, IPV6, IPX, IRC, MAPI, MOUNT, NETBIOS, NFS, NNTP, POP, PPP, TCP, TELNET, X25 and ...