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I am looking for a NIDS, my budget is as of yet undefined, but I have only heard of Cisco IDS, Stealthwatch, and Snort. What else is there to look at, appliance or software based is fine, but it must have the ability to inject response packets.<br />
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Basically, I need a list of whats out there. 
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I am looking for a NIDS, my budget is as of yet undefined, but I have only heard of Cisco IDS, Stealthwatch, and Snort. What else is there to look at, appliance or software based is fine, but it must have the ability to inject response packets.

Basically, I need a list of whats out there. 

Network Based Intrustion Detection System

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.

Software Firewalls

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.