Cacti leverages the power of RRDTool , an open-source data logging and graphing system for creating graphs from the stored datasets. Cacti also allows you to add multiple users and give them access with or without edit permissions, which is perfect for service providers and enterprises with a large NOC team. You can install ntopng on a server with multiple interfaces and use port mirroring or a network tap to feed ntopng with the data packets from the network for analysis. This level of traffic analysis helps you make informed decisions about capacity planning and QoS design and helps you find bandwidth-hogging users and applications in the network.
Icinga was created in by the same group of devs that made Nagios, so they knew their stuff. Since then, the developers have made great strides in terms of expanding both functionality and usability since then. As the Nagios pedigree might imply, its primary focus is monitoring infrastructure and services. You can also set up customizable notifications and restart services from within the app.
Note that Spiceworks is free because most of its revenue comes from the sale of ad displays in its network. This is bolstered by the fact that the free version cannot scale past a single server.
Run this on your corporate network at your own risk! The free version also enjoys a 6-month patch and update cycle. One of the most painful features held back from the free version is the lack of alerting capabilities. Those caveats aside, you get a full auto-discovery of your devices and metrics using SNMP and standard protocols, as usual.
It lets users capture traffic at wire speed or read from packet dumps and analyze details at microscopic levels. Wireshark supports almost every protocol, and has functionalities that filter based on packet type, source, destination, etc.
It can analyze VoIP calls, plot IO graphs for all traffic from an interface, decrypt many protocols, export the output, and lots more. Wireshark provides unlimited opportunities to study packets, which makes it a solid go-to for network, system, and security admins. Nmap uses a discovery feature to find hosts in the network that can be used to create a network map. Network admins value it for its ability to gather information from the host about the Operating System, services, or ports that are running or are open, MAC address info, reverse DNS name, and more.
Scalability is the other big reason why network admins love Nmap. But there is a whole other class of tools which are just free-free. It will also sync down to your phone or tablet too. Love using Instagram? Want to download a photo, video or story from Instagram? Check out 4K Stogram. Looking for good screen capture software? A really good one is Screenshot Captor. Of course, Windows has a lot of built-in ways to capture screenshots too.
Ever wanted your computer to speak out what you have written? Do you have a lot of programs that load when Windows starts? Does it take several minutes for your computer to become useable? If so, check out Startup Delayer , a program that delays the startup of programs so that your computer loads faster. In addition to the Office suites we mentioned in 35, you can also use Canva and Prezi.
Follow a lot of blogs online and still miss Google Reader? RSSOwl is a good alternative. Are you someone who prefers a supercharged Explorer interface? If so, check out Total Commander , which has been around for decades and works with Windows If you think you might have bad memory installed in your computer, you can check for bad memory using memtest Want to record your screen and live stream it too?
OBS Studio is a free app that does just that. TinyTake is another decent one, though the free version is limited. Darktable is an open-source photography workflow application. Speaking of Adobe, are there any good Adobe Illustrator alternatives?
One good one for working with vector graphics is Inkscape. Another good one is Vectr. Are you someone who needs to write something, but gets distracted easily?
Check out FocusWriter and write without distractions. One of the worst things that can happen to your computer is for it to become infected with Spyware. HijackThis is an awesome program that you can use to find and remove spyware. Another good option is AdwCleaner. One good option is Windows Defender Offline. It also has a portable version you can run off your USB stick. Are you a true nerd and still use IRC? Ever run into the problem where you are trying to delete a file in Windows and it says that the file is in use and cannot be deleted?
You can use Unlocker to delete any file that is locked by a process. Are you always thinking about stuff? Then you should probably use some free mind-mapping software. Wikipedia also has a big list of mind-mapping software. Need to manage a small project, but need some project management software? Check out GnattProject and Taiga.
If you want to play around with virtual machines, download the free and excellent VirtualBox from Oracle. In 19 and 20, I talked about software to backup your computer, but forgot to mention DriveImage XML , an good program you can use to create an image of your hard drive.
Other good disk imaging tools include MacriumReflect and Clonezilla. GNUCash is free accounting and finance software. Ever head of Blender?
It lets you create 3D worlds, 3D animations and 3D games. Check it out. If Blender is too complex for you, another great option for sketching in 3D is SketchUp. For space lovers, I always recommend Stellarium , which is basically a planetarium for your computer. Looking for a really good partition manager?
Check out GParted , probably the best not-heard-of partition manager out there. Looking for a file on your computer? Default Windows search sucks? Wish your clipboard could store more than one item at a time? Got a spare computer with some extra storage on it? Want to learn a new language? The best program for Windows in my view is Duolingo. All other trademarks are the sole property of their respective owners.
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