Free presence software for linux

Interbench is benchmark application is designed to benchmark interactivity in Linux.
Interbench is designed to measure the effect of changes in Linux kernel design or system configuration changes such as I/O scheduler, cpu and filesystem changes and options. With careful benchmarking, different hardware can be compared.
What does it do?
It is designed to emulate the cpu scheduling behaviour of interactive tasks and measure their scheduling latency and jitter. It does this with the tasks on their own and then in the presence of various background loads, both with configurable nice levels and the benchmarked tasks can be real time.
How does it work?
First it benchmarks how best to reproduce a fixed percentage of cpu usage on the machine currently being used for the benchmark. It saves this to a file and then uses this for all subsequent runs to keep the emulation of cpu usage constant.
It runs a real time high priority timing thread that wakes up the thread or threads of the simulated interactive tasks and then measures the latency in the time taken to schedule. As there is no accurate timer driven scheduling in linux the timing thread sleeps as accurately as linux kernel supports, and latency is considered as the time from this sleep till the simulated task gets scheduled.
Each benchmarked simulation runs as a separate process with its own threads, and the background load (if any) also runs as a separate process.
Enhancements:
- This release adds options to select benchmarked loads, manpages, and documentation updates.

mod_xsendfile is a small Apache2 module that processes X-SENDFILE headers registered by the original output handler.
If it encounters the presence of such header it will discard all output and send the file specified by that header instead using Apache internals including all optimizations like caching-headers and sendfile or mmap if configured.
mod_xsendfile is useful for processing script-output of e.g. php, perl or any cgi.
- Some applications require checking for special privileges.
- Other have to lookup values first (e.g.. from a DB) in order to correctly process a download request.
- Or store values (download-counters come into mind).
Benefits
- Uses apache internals
- Optimal delivery through senfile and mmap (if available).
- Sets correct cache headers such as Etag and If-Modified-Since as if the file was statically served.
- Processes cache headers such as If-None-Match or If-Modified-Since.
Installation:
- Grab the source.
- Compile and install
apxs -cia mod_xsendfile.c
- Restart apache

SipExchange is an open-source softswitch that provides standard SIP services like registration, presence and proxy. Using the SipExchange application, service providers can offer telephone services to their subscribers as well as other services based on voice, video and instant messaging.
SipExchange supports many of the standard subscriber features offered by the traditional telephone exchanges and PBXs. In addition, SipExchange supports external call control capabilities using which service providers and software developers can create new features and services rapidly and plug them into the SipExchange application.
SipExchange works with standard SIP phones that adhere to the SIP protocol standards.
SipExchange leverages the Java and J2EE technology as a basis for the architecture that is flexible, scalable and easily extensible. It runs as an enterprise application inside the JBoss server and takes advantage of many services that a J2EE server provides.
SipExchange provides a web-based user interface using which system administrators can manage subscribers and features as well as perform other routine operations. SipExchange also provides a web-based user interface using which subscribers can customize the features they have subscribed to.
Enhancements:
- SipExchange is now developed using the EJB3 architecture.
- The EJB3 architecture is the latest J2EE specification for enterprise application development.
- Although the end user does not see any difference, it is now much easier to develop back-end business logic because of this new technology.
- In addition, initial (experimental) support for Web services was added.
- The automated unit tests have been revamped.
- A number of bugs have been fixed.

Spread is an open source toolkit that provides a high performance messaging service that is resilient to faults across local and wide area networks. Spread functions as a unified message bus for distributed applications, and provides highly tuned application-level multicast, group communication, and point to point support. Spread services range from reliable messaging to fully ordered messages with delivery guarantees.
Spread can be used in many distributed applications that require high reliability, high performance, and robust communication among various subsets of members. The toolkit is designed to encapsulate the challenging aspects of asynchronous networks and enable the construction of reliable and scalable distributed applications.
Spread consists of a library that user applications are linked with, a binary daemon which runs on each computer that is part of the processor group, and various utility and demonstration programs.
Main features:
- Reliable and scalable messaging and group communication.
- A very powerful but simple API simplifies the construction of distributed architectures.
- Easy to use, deploy and maintain.
- Highly scalable from one local area network to complex wide area networks.
- Supports thousands of groups with different sets of members.
- Enables message reliability in the presence of machine failures, process crashes and recoveries, and network partitions and merges.
- Provides a range of reliability, ordering and stability guarantees for messages.
- Emphasis on robustness and high performance.
- Completely distributed algorithms with no central point of failure.
Enhancements:
- Improve manageability by allowing dynamic configuration of sets of daemons without requiring a restart;
- Improve performance;
- Ease the development of Spread based applications with better membership reporting;
- Support multi-threaded forking client applications;
- Integrate a Virtual Synchrony interface;
- Provide simpler membership APIs;
- Organize and improve the software build for both Windows and Unix systems.

Asterisk Desktop Manager application interfaces your VOIP telephony with the desktop and Asterisk PBX.
Asterisk Desktop Manager aims to integrate your desktop with the Asterisk PBX and hardware IP phone by providing some useful features such as automatic on-call volume reduction, one click dialling (from the clipboard), BlueTooth presence detection and automatic call redirection when you walk out of the office, a pop up browser on call, and transfer of the current call from the desktop.
Enhancements:
- Automatic on-call volume reduction
- One click dial from clipboard (paste number onto tray icon)
- Integrated phonebook
- List/Redirect/Hangup all active calls
- One click call forward setup
- Bluetooth presence detection to redirect calls when you walk out of the office
- Pop up browser on incoming call (integrate with your CRM to auto load customers details when they call)
- Cisco phone integration (auto speakerphone)
- Slide-in popup on incoming call, with Answer(cisco only), Hold, Busy and Redirect buttons , CallerID and duration

YES Linux is an idea started by Arthur Copeland, CEO of Saphari.com. The idea was to build a low cost suite of products and services that could enable a Mom and Pop Store (MaPs) to quickly and easily build an internet presence.
The project was understood that not all MaPs need to have an internet presence, thus the suite would also have to work while not being connected to the internet. To the MaPs, it should be transparent.
Thus, YourESale was born... and the rest is history. MaPs - MaPs are defined as companies that have between 1 and 20 employees or total gross revenue of less than $200,000.00 per year.
YES Linux is a server appliance for small and medium size networks to quickly and easily build an Internet presence. It completely installs in under 10 minutes and 2 screens.
It features a secure Web server, a secure email server with Web-based email, a firewall, spam filtering, WebDAV support, an FTP server, an SSH server, a PostgreSQL database, the Resin J2EE server, Java, Apache Ant, PHP 5, Autonomous Backups, and complete Web-based administration.
Enhancements:
- addition:
- added mod_auth_msfix
- added xmlstarlet
- removal:
- removed mondo
- removed mindi
- removed dvdrecord
- removed lzop
- removed lzo
- removed star
- removed afio
- removed buffer
- updates:
- updated gnupg
- updated rsync
- updated phppgadmin
- updated findutils
- updated java
- updated yes-java
- updated yes-backup - removed mondo and mindi and added simple multi volume homegrown
- updated yes-website - added ms auth client fix, fixed default website formatting, Changed to YES Technology Association, added new group to webdav
- updated yes-admin - added ms auth client fix, Changed to YES Technology Association, added new group to webdav
- updated yes-configuration - added default httpd configuration area to change ip, increased the max heap size
- updated yes-rebrand - Changed to YES Technology Association
- updated yes-boot - Changed to YES Technology Association
- updated yes-dns - Changed to YES Technology Association
- updated yes-intro - Changed to YES Technology Association
- updated yes-mail - Changed to YES Technology Association
- updated yes-stats - Changed to YES Technology Association
- updated yes-authentication - added user management
- updated yes-security - added user management
- updated yes-dbadmin - spec file added reporting for phppgadmin

PJSIP and PJMEDIA is the Open Source, high performance, small footprint SIP and media stack written in C language.
It has many SIP and media features such as a layered API, dialog usages, high level invite session abstraction, an event framework, SIP presence/SIMPLE, instant messaging, RTP/RTCP, a conference bridge, silence detection, PLC, and so on, as well as extensive documentation.
Enhancements:
- This release fixes a build error on MacOS, memory alignment problems on ARM, and a crash which occurred on STUN keep-alive when network connectivity was lost.