phpAgentKilla  

phpAK will currently block/log approximately 100 User Agents known to be malicious. These include email harvestors, and site rippers. phpAK will log to a MySQL database, and send you an email notification of User Agent activity it is designed to monitor.

Hosting Requirements: Apache, PHP
Database: MySQL
Price: $5

   PHPCoder  

PHPCoder is a Web-based frontend to the Turck MMCache encoding functions, which are similar to the Zend Encoder product. PHPCoder enables you to encode your PHP scripts and applications into non-reversible bytecode, thus preventing users of your programs from viewing or altering the source code while having full functionality. Another excellent use for PHPCoder is to encode your applications PHP configuration files, that way someone viewing your source code does not see your databae login and password information. It also allows you to set restrictions on the encoded scripts, you can lock a script to a particular server IP address, server host name, visitor IP, or even place a time limit on the script so it will expire after a configurable amount of time. You specify Text, HTML, or PHP code that should be prepended and appended to each file before it is encoded, allowing you to easily and securely implement your own licensing scheme.

Hosting Requirements: Unix/Linux, Windows; PHP 4.1+; Turck MMCache
Price: Free (BSD)

   IP Blocker Basic  

Block or allow users to visit your site by IP.

Hosting Requirements: Linux; PHP
Price: Free

   View Once w/ time limit - resource protector  

You can use this view only once script along with your current log-in script. This script will allow you to restrict access to a particular file. The user can view the resource only once within a pre-set ammount of time. The username, password, date and the users IP address are written to a logfile. The script compares the username and password combonations for a match and determines if the alloted time limit has expired. If all is well the function returns back to your actual log-in script.

Price: Free

   Cryptomak Cipher Tools  

Cryptomak is collection of php scripts for encryption and decryption purpose. Cryptomak is using Phrame as web application platform which implements MVC (Model, View, Controller) design. At the view layer, Cryptomak is using Smarty as template engine.

Price: Free (GPL)

   TuNG  

If you have visited the e-gold.com web-site or any other large systems, which requires high security from their user accounts you know that you can not access your account without typing in randomly generated deformed number (so called 'Turing number'). Using this function allow system prevents uninvited guests access to accounts by means of automatically generating multiple login/password combinations. The always changing requirement for a turing number is used to avoid mass registrations.

Hosting Requirements: Unix; PHP 3+; GD
Price: $35

   The Code Lock  

The Code Lock allows you to easily encrypt both PHP and HTML code, protecting your pages with bulletproof technology. This script also encrypts your PHP output so if your PHP script displays results of any kind, it will be encrypted as well.

Hosting Requirements: PHP 4+
Price: $37

   Simple Browser Proxy  

Simple Browser Proxy was derived from a wish for an easy to use proxy that didn't require any installation or odd programs to be running. Thus, SBP isn't meant to be used by someone who wants/requires total anoniminity.

Hosting Requirements: PHP 4.2.0+
Price: Free (LGPL

   PassMasterFlexPlus  

This is a database-driven multiple login that utilizes cookies for authentication. PassMasterFlex+ was written not only to provide an alternative to the Apache login but in response to numerous requests to have multiple users. Features: Cookies Based - When user logs out, cookie is removed from user PC - Utilizes md5 encryption for password - Logout window - MySQL Database.

Hosting Requirements: PHP
Database: MySQL
Price: Free

   iScramble  

iScramble is a PHP script that allows you to protect sections of your HTML code from prying eyes. It scrambles the text into a form that is not human readable, and generates some JavaScript code to descramble it. The JavaScript generated is self contained. It includes the scrambled text and code to descramble it. iScramble can scramble any HTML code. It is particularly useful for hiding email addresses from email address harvesting robots. If you place your email address in plain text on a page on your site, chances are that it will be found by one of these harvesters, and your email address will be sold to spammers. Use iScramble to prevent this.

Hosting Requirements: PHP 4
Price: Free