CSS Globe has shown us a little trick that you can apply to your forms to enhance user experience. We will display editable form data (indented to be edited, updated) as regular tabular data intended for reading.
This works on most modern browsers with pure CSS, but we need a little bit of Javascript in order to make this work on Internet Explorer though, because of the lack of support for :focus pseudo-class.

GaleriaSHQIP is a free PHP-MySQL image gallery script for easily displaying any number of images.
It has an admin panel to upload new images or delete/update the previous ones.

The script offers a simple interface for presenting images & upon-click, they can be viewed in their original sizes in a modal box (uses piroBox).
GaleriaSHQIP has a web-based installer for a quicker installation & has a built-in brute-force filter + various other security features.
Mysql Ajax Table Editor is an open source web application for easily editing MySQL tables & creating admin pages almost instantly.
Besides the standard “add, edit, copy, delete, view” functionality, records can be paged, searched & exported to CSV.

It is possible to JOIN multiple tables to generate a custom view (+ apply any other functions on this view) with the help of a configuration file. Also, column names displayed can be customized for a better presentation.
MySQL Ajax Table Editor has permissions support which can be set on a per column or table basis for limiting functions.
Users can hide/show & re-order columns which is very useful when working with the data.
The application works with both PHP4 & PHP5 and comes with 5 ready-to-use languages where new ones can be created.
Sequel Pro is a free MySQL management tool for Mac OS X.
It offers full table management (including indexes), supports MySQL views, imports/exports from SQL/CSV files & compatible with MySQL 3/4/5 databases.

The application supports SSH tunnel connections besides standard local & remote connections for reaching databases behind firewalls.
It can connect to multiple databases at the same time, offers automatic syntax highlighting for your custom queries, supports ~30 different encoding options & much more.
P.S. The project is open source & you can check the source for improving it further.