Express Talk VoIP Softphone
Express Talk is software that works like a telephone to let you make calls from your PC. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free. You can also call ordinary telephone numbers anywhere in the world if... Features: ~ Lets you make internet phone calls free direct PC to PC, or PC to phone via a VoIP SIP gateway provider. ... It uses the SIP protocol and is compatible with most major VoIP SIP service providers.
http://www.audiochannel.net/software/talk.zip - 430Kb - Download - Screenshot

Embedded VOIP SIP Developers Kit
Embedded Windows CE VOIP Developers Kit is your embedded telephony solution for developing software/hardware to enable device to device phone calls using SIP/H323 phone right at the electronics level. The design is based on Hybrid Combination of RFC SIP Protocol and Windows RTC and is today... Research Lab further enables you to create production level voip system with following tools Available : A complete multi-lingual speech synthesis workbench using Festival TTS Available: A complete multi-lingual speech recognition workbench using ISIP ASR Available: Speaker Verification (with two...
http://www.ipchip.com/downloads/wincevoipsip01.zip - 2Mb - Download - Screenshot

Phoner
Phoner is a free softphone for ISDN and VoIP telephony. An answering machine and Text-To-Speech support complete the large package.
http://www.phoner.de/PhonerSetup.exe - 2Mb - Download - Screenshot

VoIPerized
VoIPerized is a so called VoIP (Voice over IP) program. VoIPerized enables you to make free audio calls to other people who also run VoIPerized. When making VoIPerized the focus was to minimize the latency, because other VoIP programs always seemed to have an irritating lag which makes the... (Universal Plug & Play) support. ... 120 seconds + ping time) - Conference with unlimited people at the same time - Contact list supports unlimited number of contacts - Adjust the bitrate to your needs - High audio quality (16 kHz sampling) - Low CPU usage - Adaptive Jitter Buffering - Smart...
http://www.student.tue.nl/m/j.s.d..../voiperized/voiperized24setup.exe - 316Kb - Download - Screenshot

PBXPress Live CD Demo
PBXpress is a modern-day replacement for traditional PBX systems. Instead of working with wires and cables, it utilizes Internet technologies. In particular, it uses VoIP (voice over IP) technology to transmit calls. All of your phones are connected and provisioned via an IP network, your calls... ve tried to use a residential VoIP company? ... PBXpress can act as a bridge across the firewall for VoIP calls, eliminating such problems. ... Boot your PC from the CD you have just burned. ... You must burn it as an ISO image file, not a data file.
http://www.pbxpress.com/download/pbxpress_demo.iso - 16Mb - Download - Screenshot

Uplink Skype to Sip Adapter
Uplink connects SIP protocol VoIP calls to the proprietary Skype phone network. It works in both directions. The SIP protocol has become the industry standard for VoIP. Thousands of telephone companies, IP phone manufacturers and virtual IP based PBX systems use this protocol to connect calls. ... Features: ~ Connects both incoming and outgoing calls to the Skype network. ... ~ To use Sip Based Voicemail Systems or Sip Based IVR Systems (for example information lines) on Skype calls. ... ~ Can be used to make SkypeOut calls from a SIP device or SIP PBx.
http://www.nch.com.au/skypetosip/uplinksetup.exe - 238Kb - Download - Screenshot

[ClosedTalk]
[ClosedTalk]TM is a secure VoIP solution for internet talk in total privacy. [ClosedTalk]TM provides user privacy, the confidence in the Identity of your talk partner and all other benefits of a VoIP solution. All data to establish a connection and the actual voice data are transmitted in an... Unlike other VoIP solutions, [ClosedTalk]TM protect the communication through strong encryption technology, direct key exchange between the partners, and optional trustful authentication by digital certificates.
ftp://ftp.ce-infosys.com/cei/English_ClosedTalk.exe - 7Mb - Download - Screenshot

SoundTap Streaming Audio Recorder
SoundTap lets you record just about any audio that plays through your Windows computer. Simply install this software, turn it on and then all sound played on or through the PC will be recorded as wav or mp3 files. All audio is 'tapped' by a virtual driver directly within the kernel so the... This is useful for recording voip calls. ... ~ Recording of VoIP calls, softphones or instant messaging audio by companies for legal reasons. ... ~ Saves files in wav or mp3 format with a wide range of selected codec and compression options.
http://www.audiochannel.net/software/st.zip - 223Kb - Download - Screenshot

P2P VoIp
The program is used for conversation in a local network. The voice packages are transmitted in a format GSM6. 10. Voice packages and service information use one and the same UDP port: 4444. The program works without Server. The ContactList traces if the client is online or offline in a network. ... Mixer allows to control sensitivity of a microphone and loudness of speaker. ... Simultaneous work with 5 clients. ... The sound card should be duplex. ... The program is distributed with the source code.
http://phonesnd.com/p2pv11.zip - 684Kb - Download - Screenshot

VOIP Call Shop Billing Software
Using our Call Shop Billing system you can even grant customers with credit by taking payment before even they make a call. So with us you will have two options either to bill your customers after the completion of call (Post Paid Billing) or accept payment before they make a call and a lot them... Call Shop Billing System can be used with any RADIUS server which supports the VoIP functionality and provide the ability to define the structure of authentication and accounting tables for example Advanced Radius.
http://AdvancedVoIP.com/demo/AdvancedVoIPBillingSystem.exe - 55b - Download