Free solutions software for linux

E/AS Automation Solutions is open source software system for help automate your solutions even for personal and/or corporate ones.
E/AS written on CLIP language (CA-Clipper dialect, compiler can be obtained from ITK.ru) and uses CODB (CLIP Object Database) as data storage.
Main features:
- client-server technology (both data and interface forms)
- component infrastructure with interaction between components by messages
- interface forms on XML
- MDI
E/AS contains in typical distribution:
- client software written on clip-ui library
- server software with wrapper for run as daemon
- maintenance tools: CODB console and component manager
- base (form, auth) and example (contact) components
Enhancements:
- completely rewrite code for implement E/AS architecture
- component infrastructure
- own server program instead COBRA
- maintenance tools: CODB console and component manager
- base and example components
- autoupdate views

Sudokut is a command line solver for Sudoku puzzles. When supplied with a Sudoku string or file, it returns all possible solutions.
Sudokut takes approximately half a second to solve a medium force Sudoku by using an efficient algorithm that is guaranteed to find all the solutions. It accepts many options that implement various features (validity check, diff, suggestions, and probing).
Enhancements:
- two new solving techniques are supported: naked triplets reduction, hidden triplets reduction
- new -u option to test the unicity of the solution
- new -m option to modify the string

SENTENSA Knowledge Miner is a platform independent tool for searching any text.
SENTENSA uses robust methods of indexing and searching text, leveraging experience from more than 20 years of information retrieval.
SENTENSA products offer advanced text retrieval solutions for large databases that will make your searches for key information fast and effective. You can index on one platform and query on another.
Main features:
- Fast indexing
- Probabilistic Search
- Similarity Search
- Strong Terms
- Indexed Terms
- Relevance Rankings
- Rapid Searching in huge amounts of information
- Spider including conversion from PDF and HTML to XML
Enhancements:
- An SQL filter that supports MySQL was added.

rinse software was born out of a frustration with the currently available solutions for installing minimal copies of RPM-based distributions.
The need to perform simple chroot() installations of other distributions is not common, but the ability to do such a thing is very useful when it comes to testing new tools, and working towards the creation of new Xen guests.
The following distributions are supported:
- Centos 4 & 5
- Fedora Core 4, 5, 6 & 7
I plan to support OpenSUSE in the near future.
Enhancements:
- This is primarily a bugfix release, which restores the ability to install new distributions of Centos 4 & 5.

Xokoban project is my (C++) sokoban game for X11.
Main features:
- Undos right back to your first move
- Go to any level - you dont have to play them in order
- recording of solutions. If you solve a level or find a better solution, the new solution will be remembered
- can show the solution for any level, if one has been found
- a demo mode which shows all solutions or levels
- a nice-looking game board with a configurable color scheme, 4 are included.

Foxtrot is a small and powerful API for using threads with Swing.
Its a small and powerful API for using threads with the Java(TM) Foundation Classes (JFC/Swing).
It is based on a new concept, the Synchronous Model, which greatly increases ease of use.
While other solutions have been developed to solve this problem, being the SwingWorker (see also here for an update) the most known, they are all based on the Asynchronous Model which, for non-trivial Swing applications, carries several problems such as code asymmetry, bad code readability and difficult exception handling.
The Foxtrot API cleanly solves the problems that solutions based on the Asynchronous Model have, and its simpler to use.
Main features:
- code symmetry and readability
- easy exception handling
- improved mantainability

mod_but is an Apache 2.x module designed to operate as reverse-proxy enhancement component. mod_but integrates with mod_rewrite, mod_replace, mod_proxy, mod_security, mod_headers and other standard modules.
Main features:
- Pre-Authentication (Login)
- Cookie based session handling between the client and the reverse-proxy. This session is referred "mod_but session"
- Cookie hiding of backend application cookies (shared memory store). This session is referred as "Backend Session"
- Session store
- Session termination (Logout)
- HttpOnly support
- FREE cookies support (which are not handled by mod_but)
- URL Authorization: Check if user is authorized requesting the desired URLs
- Restrict authentication=ok messages to backend login services