Free there is no need to software for linux

AsterFax is an email to fax gateway for the transmission of faxes using Asterisk.
Asterisk is an Open Source PABX (or PBX) which provides all of the functionality of a high end PBX, free of charge.
AsterFax builds on the services provided by Asterisk to provide a full fledged email based Fax Gateway.
What that means is that with AsterFax and Asterisk you can send faxes from your desktop using your standard email client without have to install any software on your desktop.
AsterFax can translate a normal email message into a fax message. You simply enter the destination phone number in the To address, compose your email message and click send. Its that easy.
For more formal correspondence AsterFax also supports a growing number of file formats such as PDF, Tiff, Postscript, MS-Word and OpenOffice Writer. You can either attach the file to your email message or for applications such as MS-Word and OpenOffice you can fax directly from the applications by using the Send Email option. The resulting email is sent as a fax message.
If any errors occurring during transmission a error report is sent back to your inbox.
You can also preview how the fax will look by sending email to the special preview address, which simply formats the message ready for transmission and then sends it back to you via email for previewing before the fax is sent.
AsterFax supports a growing list of file types such as Tiff, PDF, postscript, MS-Word, MS-Excel and the OpenOffice Writer. AsterFax is also extensible in that you can easily add support for additional file formats via the AsterFax.xml configuration file providing that you have access to a third party product that can convert your required file format to one of the supported file formats such as PDF or tiffg3.
Additional file formats will follow shortly (see the Roadmap).
For the technically minded AsterFax is written in pure Java and utilizes the Asterisk Manager API to submit jobs.
AsterFax uses external applications to perform the conversion of attachments to the required tiff format for transmission.
AsterFax can be extended via a simple xml configuration file to convert and transmit any other file format providing a suitable conversion application is available.
AsterFax includes a simple standalone SMTP gateway which handles the receipt of emails. AsterFax is not a complete SMTP gateway in that it will only accept messages which are to be faxed. Alternatively AsterFax can be integrated with your existing SMTP server (Sendmail. Postfix, Exchange Server) by way of tools such as Procmail.
AsterFax requires Asterisk@Home or Asterisk with the spandsp (txfax, rvfax) extensions.
Main features:
- Built as an extension to Asterisk.
- Integrated SMTP gateway provides a simple one stop install.
- Support for a number of file formats including: Tiffg3, Postscript, PDF, Word, OpenOffice Writer.
- Preview mode allows previewing of rendered faxes before they are sent.
- Support for multiple Asterisk Channels as well as group channels (e.g. Zap/g0).
- Send faxes without specialised Fax Modems (just use your existing Asterisk/Digium hardware).
- Send faxes directly from MS-Word and OpenOffice Writer
- No client side install required.
- Send standard email (text or html) as fax or attach a Word, PDF, Writer etc.. for transmission as a fax.
- Email body used as a Coversheet to attachments
- Send to multiple recipients in a single message by providing multiple To addresses.
- No special formatting required in the email.
- Extensible support for additional file formats via simple xml configuration file.
- Built-in test suite to aid in configuration and installation.
- Automatic Archiving of all faxes to a designated mailbox.
- Automatic Delivery receipts.
Whats New in 1.0 Stable Release:
- This release is the culmination of months of effort and includes a number of bug fixes as well as a few new features.
- Most notably this is the first release of AsterFax Free Edition.
- The free edition includes all the features of any other edition but will only transmit a single fax at a time.
- Thanks to everyone that has given us feedback and helped make the product what it is today.
- We look forward to working with you all on this release.
Whats New in 1.1 Beta 3 Development Release:
- This release includes an enhancement that allows the header and footer to vary with the destination fax number.
- A different company name and header and footer format can be used for each destination fax number.
- It also adds a new ReturnFaxNumber property, which is included in the header and footer with a %R parameter.
- There is no need to change any configuration files to use beta 3, but AsterFax.xml must be modified according to the release notes to make use of the feature.

nobel is a small ANSI C boolean expression parsing library and program for projects that need boolean expression parsing support built in, but bigger tools are overkill in size or options.

tinc is a Virtual Private Network (VPN) daemon that uses tunnelling and encryption to create a secure private network between hosts on the Internet.
tinc is Free Software and licensed under the GNU General Public License.
Because the VPN appears to the IP level network code as a normal network device, there is no need to adapt any existing software. This allows VPN sites to share information with each other over the Internet without showing any information to others.
Main features:
- Encryption, authentication and compression
- All traffic is optionally compressed using zlib or LZO, and OpenSSL is used to encrypt the traffic and protect it from alteration with message authentication codes and sequence numbers.
- Automatic full mesh routing
- Regardless of how you set up the tinc daemons to connect to each other, VPN traffic is always (if possible) sent directly to the destination, without going through intermediate hops.
- Easily expand your VPN
- When you want to add nodes to your VPN, all you have to do is add an extra configuration file, there is no need to start new daemons or create and configure new devices or network interfaces.
- Ability to bridge ethernet segments
- You can link multiple ethernet segments together to work like a single segment, allowing you to run applications and games that normally only work on a LAN over the Internet.
- Runs on many operating systems and supports IPv6
- Currently Linux, FreeBSD, OpenBSD, NetBSD, MacOS/X, Solaris, Windows 2000 and XP platforms are supported. See our section about supported platforms for more information about the state of the ports. tinc has also full support for IPv6, providing both the possibility of tunneling IPv6 traffic over its tunnels and of creating tunnels over existing IPv6 networks.
Enhancements:
- This release fixes some memory and resource leaks, and makes network sockets non-blocking under Windows.

WebDirectory provides a Web-based filesystem frontend.
WebDirectory provides a Web-based frontend to an ordinary directory structure of your filesystem. There is no need to import your current data, and no problem exporting your data for backup. It is kept very simple to provide maximum efficiency.
You can upload, download and delete files; create and delete directories; configure multiple instances; and have optional user authentication.
Main features:
- Upload files
- Download files
- Delete files
- Create directories
- Delete directories
- Configure multiple instances
- Optional user authentication

Damn Vulnerable Linux (DVL) is a Linux-based (modified Damn Small Linux) tool for IT-Security & IT-Anti-Security and Attack & Defense. Damn Vulnerable Linux was initiated for training tasks during university lessons by the IITAC (International Institute for Training, Assessment, and Certification).
Damn Vulnerable Linux (DVL) is highly integrated into the community project crackmes.de (http://www.crackmes.de) and is frequently updated with new community provided lessons. Damn Vulnerable Linux (DVL) is your place either to get the latest Damn Vulnerable Linux (DVL) distribution, to get new lessons, or to submit own lessons based on the Damn Vulnerable Linux (DVL) training system.
Damn Vulnerable Linux (DVL) is provided without any fee or charge! Actually, it is a perverted Linux distribution made to be as insecure as possible. It is collection of IT-Security and IT-Anti-Security tools. Additional it includes a fullscaled lesson based environment for Attack & Defense on/for IT systems for self-study or teaching activities during university lectures. Its a Live Linux Distro, which means it runs from a bootable CD in memory without changing the native operating system of the host computer.
As well it can be run within virtual machine environments, such as qemu or vmware. There is no need to install a virtual machine if you use the embedded option. Its sole purpose in life is to put as many security tools at your disposal with as much training options as it can. It contains a huge ammount of lessons including lesson description - and solutions if the level has been solved by a community member at crackmes.de.
Damn Vulnerable Linux (DVL) is meant to be used by both novice and professional security personnel but is not ideal for the Linux uninitiated. Damn Vulnerable Linux (DVL) assumes you know the basics of Linux as most of your work will be done from the command line. If you are completely new to Linux, its best you stop playing with this system.
INSTALLED TOOLS
- HT 0.5
- libreadline4_4.2a-5_i386
- gdb_5.2.cvs20020401-6_i386
- binutils_2.12.90.0.1-4_i386 (including objdumps,gas,strings ...)
- nasm-0.98-1.i386
- HLA v1.86
- libelfsh0-dev_0.65rc1-1_i386
- elfsh_0.65rc1-1_i386
- Apache 2.0.5.4
- Php 4.4.0
- ethereal-common_0.9.4-1woody12_i386
- ethereal_0.9.4-1woody12_i386
- libpcap0_0.6.2-2_i386
- tcpdump_3.6.2-2.8_i386
- lsof_4.57-1_i386
- ltrace_0.3.26_i386
- nmap_2.54.31.BETA-1_i386
- strace_4.4-1.2_i386
- ELFkickers-2.0a (including sstrip, rebind, elfls, ebfc, elftoc)
- GCC/G++ 3.3.4
- GNU Make 3.80
- bastard_bin- 0.17.tgz
- Mysql-server 4.4.1
- Ruby 1.8
- Python 2.3
- lida-03.00.00
- DDD 3.3.1
- Metasploit Framework

Host Identity Protocol on Linux is an implemetation of the Host Identity Protocol (HIP) and the related architecture. Host Identity Protocol (HIP) is a proposal to change the TCP/IP stack to securely support mobility and multi-homing.
Additionally, it provides for enhanced security and privacy and advanced network concepts, such as moving networks and mobile ad hoc networks. HIP is "cool", which means that as a mobile VPN solution, when your network interfaces go up or down, there is no need to re-establish a secure tunnel.
Enhancements:
- The implementation was moved from kernel to user space.
- Support for the Nokia 770 Linux PDA (ARM) was added.