Sometimes, when develop something new or try to find problem somewhere, you need to read the "raw" info. Thus, this plugin is the right tool. But it is too powerful, so it is not for everyone.
Bloggers, self-webmasters, average users: This is not right tools for you. Contact me, I can create anything what you will need, but leave this plugin away. It can (and will) destroy your site within seconds. No joke...
Developers: Generally not for you too, but if you are brave enough, and want to learn - you are welcome. Sorry to repeat, but it is dangerous, because it is so powerful. Imagine your plugin is a car - shiny and power (80 kW, 110 hp). So WordPress itself is a truck (450 kW, 600 hp). This plugin is not a truck. It is not locomotive (1,500 kW, 2000 hp) too. Nor haul truck (2,610 kW, 3,500 hp). It is a ship (81 MW, 109,000 hp), but it is not rocket. Be warned...
Gurus: It contains 3 tools. First allows to see WP settings file, environment variables and PHP init settings. Second allows direct communication with database, think about "mysql" UNIX command line tool. It is very light phpMyAdmin. Third is terminal-like tool, allowing command row, almost like SSH, but restricted to HTTPD user rights and no way to run continuous tasks like "top". Also there is more useful tools: formatted debug output (to mail, file and URL), debug shortcode and site wide debug email. There exists a non-WP version too, with more functions.
1. Create MD5 of your password
2. Upload the archive by "Add new"->"Upload" on "Plugins" page
3. Click "Edit" under plugin name at "Plugins" page. Put MD5-ed password in $thepassword variable at first code row in kstools.php
4. Activate the plugin through the "Plugins" menu in WordPress
5. Click "KC Tools" row in "Settings" within "Admin dashboard". First time you will be asked about password.
Ask me, I will answer. Did you have some suggestions? What else you would like to have as tools?
Contact me.