Free performs software for linux

exrtools project is a set of simple command-line utilities for manipulating with high dynamic range images in OpenEXR format. OpenEXR is a high dynamic-range (HDR) image file format developed by Industrial Light & Magic for use in computer imaging applications.
exrtools was developed to help experiment with batch processing of HDR images for tone mapping. Each application is small and reasonably self-contained such that the source code may be of most value to others.
exrtools currently only works with RGBA OpenEXR files. As well, the code assumes that the EXR files and PNG files all use sRGB primaries and gamma function. Fixing this is not very difficult, and the code to fix allows for some interesting possibilities. That said, I do not have time right now, so this will have to wait.
exrtools and its source code is released under an MIT-style license and may be used in both commercial and non-commercial applications without fee.
Applications
exrblur
Applies a gaussian blur to an image.
exrchr
Applies spatially-varying chromatic adaptation to an image.
exricamtm
Performs tone mapping using the iCAM method.
exrnlm
Performs non-linear masking correction to an image.
exrnormalize
Normalize an image.
exrpptm
Performs tone mapping using the photoreceptor physiology method.
exrstats
Displays statistics about an image.
exrtopng
Converts an image to PNG format.
jpegtoexr
Converts an image to EXR format from JPEG.
pngtoexr
Converts an image to EXR format from PNG.
ppmtoexr
Converts an image to EXR format from PPM. Works with the 16 bit per channel PPM files from dcraw for digital cameras with RAW modes.
Enhancements:
- Added the ppmtoexr application to convert from PPM formats including the 48 bit per pixel format output by dcraw.

Web Form Factory is a simple application that binds HTML forms to a database. It analyzes the HTML file you supply and identifies all the common input types it contains, including text fields, drop down lists, checkboxes, radio buttons, and text areas.
Once all the input types have been detected, it then performs some validation tests that ensures that enough information is contained within the HTML form to allow the program to bind the inputs properly. It then generates the required backend PHP code and returns the form back to the you in a zip file.
Enhancements:
- Form Validation Capabilities were added.
- The user can easily specify which fields are mandatory, and the location and appearance of error messages can be configured.
- A new Tag engine was added.
- Tags can be used to make form generation even simpler and faster by eliminating repetitive form coding tasks.

Powernap is a small Python extension for accurate sleeping. Pythons time.sleep() function is fairly inaccurate. It is definitely not accurate enough for music, games, or graphics. powernap can sleep too long or too short, and usually does.
Using Linuxs real-time clock (RTC) allows for more accurate timing. This extension wraps all the messy RTC stuff and provides nap(), which performs the same job as sleep(), but more accurately.
Even more usefully, it provides rnap(), which is a padding nap. That is, if you call rnap(30), it will nap for however many milliseconds are required to make the time since the last nap 30 milliseconds. rtc_on() sets up the real-time clock, and rtc_off() turns it off. It also switches the scheduler to SCHED_FIFO.
Enhancements:
- This is the second public release.
- Most of the timing was moved into the C extension.
- rnap(), the rolling padding nap, is provided.

MP3 as CD verifier 2 performs lookups on CDDB servers in an attempt to determine whether one or multiple directories of downloaded/ripped MP3 files has correct track lengths.
Please remember that mp3ascd uses the alphabetically sorted list of .mp3 files per directory Hence it is possible that if your filenames are somehow mismatched (case?), they may be sorted incorrectly. If youre getting a mismatch that you think is wrong, run mp3ascd with default options to make sure that the enumerated list of files it finds is sorted correctly.
To install, firstly make sure the script is executable.
I copy mine into a directory in my PATH, such as /usr/bin/. It should work on a multitude of platforms, but if it does not work on yours, please let me know.
Enhancements:
- Improved readability
- Summary reports (recursive), including non-matching directories
- ID3 tag presence info shown in full display mode

Dump/Restore project examines files in a filesystem, determines which ones need to be backed up, and copies those files to a specified disk, tape or other storage medium.
Subsequent incremental backups can then be layered on top of the full backup.
The restore command performs the inverse function of dump; it can restore a full backup of a filesystem.
Single files and directory subtrees may also be restored from full or partial backups in interractive mode.
Enhancements:
- This is a maintenance release, fixing a few bugs related to the restoration of ACLs and huge backups (symtab over 2GB in size).
- The directory hash indexing has been made optional since it may require too much memory when restoring huge backups.

Serbert is a command line utility which performs a Bit Error Rate Test (BERT) on serial lines for Unix and its variants. It does this by transmitting bytes, and waiting for their uncorrupted return.

Serbert, however, does not provide a true Bit Error Rate Test (BERT), as it does not check the individual bits returned. It uses the operating systems standard serial interface, which provides the status of each returned byte.

ARPSpoofDetector performs active and passive detection of ARP spoofing and IP (IPv4) address collision. The program can send healing packets with regular ARP information.
ARPSpoofDetector is new GPL project initialized by NetMasters.CZ customers (specially 100MEGA Distribution). We didnt find suitable intrusion detection system or another applicable software to solve ARP spoofing detection and IP collision without false alarms and with easy configuration for our customers.
Main features:
- passive ARP spoofing detection from broadcast ARP reply packets
- passive IP collision detection from broadcast ARP packets and netbios packets
- active IP collision detection by sending ARP request packets
Log example:
Mon Jul 23 21:49:26 2007
Warning: IP 192.168.1.10 collision detected!
SERVER MAC address: 00:4f:ED:7C:3A:B9
ATTACKER MAC address: 00:20:38:7C:3A:CE
Attacker NETBIOS name: PERSEUS
Attacker NETBIOS group: WORKGROUP
Last attacker IP was 192.168.1.9
IP changes history:
From: Mon Jul 23 21:48:47 2007 To: Mon Jul 23 21:49:10 2007 was IP 192.168.1.3 (maybe over DHCP)
From: Mon Jul 23 21:49:10 2007 To: Mon Jul 23 21:49:26 2007 was IP 192.168.1.6 (maybe over DHCP)