1. FreeDB
FreeDB offers 1 database per user with 100 MB. For extended functionalities, you can upgrade the free version to premium for $5/month. With free phpMyAdmin panel and support FreeDB looks promising.
2. FreeMySQLHosting
FreeMySQLHosting is probably run by the same folks as FreeSQLdatabase because the only thing that differs is the domain name and the landing page. They probably share the same user database.
3.DB4Free
DB4free is not recommended for production services. There is possibility of data loss and outages. Setting aside the fore warnings, DB4free offers up to date versions of MySQL and phpMyAdmin.
4.Remote MySQL
Remote MySQL also offers a free database with phpMyAdmin for administration and limited to 100 MB. However, as mentioned on their website there are no limits on the number of queries or bandwidth.