Free lossless data compression software for linux

SSHTerm is a fully-featured Java SSH terminal that provides a whole range of features including port forwarding, password and public-key authentication, full clipboard support, record and playback input/output, and the ability to load/save connection settings to a file.
The SSH terminal is now seamlessly integrated with a secure VNC viewer, a port forwarding manager, and a full SFTP client.
Main features:
- Supports SSH1, SSH2, VNC, Telnet, SFTP, Secure VNC and Socket connections
- Supports SSL-Explorer VPN proxying
- SSH supports password, public-key and keyboard-interactive authentication
- Identity manager allows creation of keys and reduces password entry
- Configure remote systems for access with your public-keys automatically
- Faster data transfer rates than competing applications
- Platform independent - supports Windows, Macintosh, Linux, Solaris
- Intuitive interface for maximum user friendliness
- Terminal supports VT100, VT220, VT320 and ANSI Emulations
- Multiple sessions can appear as seperate tabs in the interface
- VNC supports Hextile, ZLib, Raw encodings
- Fully configurable terminal with various color/cursor settings
- Spawn new windows or clone existing sessions to new windows
- Resizable fonts can scale proportionally with screen size
- Data compression supported
- Supported ciphers are 3DES-CBC and Blowfish-CBC
- Store connections & settings to file

Ext2 compression extension (E2compr) is a small patch against the ext2 filesystem that allows on-the-fly compression and decompression. It compresses only regular files; the administrative data (superblock, inodes, directory files etc.) are not compressed (mainly for safety reasons).
Access to compressed blocks is provided for read and write operations. The compression algorithm and cluster size (see section Clusters) is specified on a per-file basis. Directories can also be marked for compression, in which case every newly created file in the directory will be automatically compressed with the same cluster size and the same algorithm that was specified for the directory.
E2compr is not a new filesystem. It is only a patch to the ext2 filesystem made to support the EXT2_COMPR_FL flag. It does not require you to make a new partition, and will continue to read or write existing ext2 filesystems. You should consider it is only a way for the read and write routines to access files that could have been created by a simple utility similar to gzip or compress. Compressed and uncompressed files will coexist nicely on your ext2 partitions.
Usage
Basically, a file is compressed with the command `chattr +c filename, and decompressed with the command `chattr -c filename. You can also do `chattr +c (etc.) on a directory. The directory itself wont be compressed, but any new files created in that directory inherit that directorys compress flag and compression algorithm and cluster size.(1)
Use lsattr to see if a file should be compressed or not, and to see what compression algorithm and cluster size will be used.
Use e2ratio to see how much disk space is used by the compressed form compared to the uncompressed form.
You can also try the `-u or `-r options to lsattr. (The difference is that, for directories, e2ratio finds the disk usage of the whole directory tree, like du, whereas `lsattr -u only shows the space taken by the directory file, like `ls -s.)
Enhancements:
- kernel 2.4.26 and 2.6.18.5 patch sets.
- Allows repeated compress/decompress cycles.
- The ability to compile within a compressed directory tree.
- This release corrects small file sizes and fixes all known GPFs.
- It removes compiler warning messages and regularizes debug output.

MySpace Data Mining Tools are a set of Java classes designed to mine information from MySpace profile and blog pages using a multi-threaded Web page access method.
Enhancements:
- Direct database connectivity via JDBC was implemented for data storage.
- A basic user profile class was created to handle both user data compression and database access.
- Minor bugs were fixed for some of the raw data accessing routines.

DOG Data Organizer provides a bookmark organizer for various bookmark types.

DOG is a personal knowledge manager based on topic maps. It currently specializes in managing bookmarks.

It imports and exports Netscape, Mozilla, and KDE2 (XBEL) bookmark files, and it imports KDE1 bookmarks and Windows IE Favorites.

FLAC is a lossless compression method for audio files. Using it, one is able to reduce the filesize and keep the same audio quality as a regular WAV file (CD quality).

The FLAC format is open source, and can be read without any problem by such applications as Amarok or Kaffeine.

Wav and Flac conversion contains two service menus: one to convert WAV files into FLAC, and one to convert FLAC files into WAV.

You will need the FLAC application to be installed on your system to use these service menus.

Test::Data is a Perl module to test functions for particular variable types.

SYNOPSIS

use Test::Data qw(Scalar Array Hash Function);

Test::Data provides utility functions to check properties and values of data and variables.

Functions

Plug-in modules define functions for each data type. See the appropriate module.

How it works

The Test::Data module simply emports functions from Test::Data::* modules. Each module defines a self-contained function, and puts that function name into @EXPORT. Test::Data defines its own import function, but that does not matter to the plug-in modules.

If you want to write a plug-in module, follow the example of one that already exists. Name the module Test::Data::Foo, where you replace Foo with the right name. Test::Data should automatically find it.

Data::Password::Manager is a Perl module to generate, check, manage crypt - des passwords.

SYNOPSIS

use Data::Password::Manager qw(
pw_gen
pw_valid
pw_obscure
pw_clean
pw_get
);

$password = pw_gen($cleartext);
$ok = pw_valid($cleartxt,$password);
$clean_text = pw_clean($dirty_text);
($code,$text) = $pw_obscure($newpass,$oldpass,$min_len);
$passwd = pw_get($user,$passwd_file,$error);

$password = pw_gen($cleartext);
Generate a 13 character DES password string from clear text
input: string<<less