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Personally, I have trouble with phpmyadmin failing with "page cannot be displayed" quite frequently, causing me to have to refresh a number of times before the page is displayed.
mysql-front is a free gui front end which runs on your PC rather than in a browser and uses myodbc to connect.
It allows easy filtering of data and many commands.
Another program which is useful is SQLyog, which is good for running queries and exporting results to files or clipboard. Particularly useful, is that you have control over what the delimiters are between fields (including none!). This allows you to build up sql queries from sql easily without the need for multiple "concat" commands!
Between the two, I find them a very good replacement for phpmyadmin.