Roy Orbitson

<a href="https://www.adminer.org/" rel="nofollow ugc">Adminer</a> is a database administration tool that allows viewing and editing of databases tables, routines, triggers, etc. It also allows running SQL statements to import data, make bulk changes, or perform other complex operations. It is similar in function to phpMyAdmin. It is intended for use by developers and those who have had experience with databases.
This plugin provides a secure connection to your WordPress database, limited to that which is saved in your WordPress configuration, and access is granted only to logged-in accounts that possess the <code>edit_plugins</code> capability (normally admins). This ensures it can only used by those who already have enough privilege to pose a risk to the installation. Each and every request to Adminer will first be authenticated using your WordPress session. Some security plugins impose extra restrictions on admin sessions, so this plugin may not work if you have one installed.
Note that any other databases on the same host and protected by the same credentials will also be accessible in Adminer. This is how databases operate and not a limitation of Adminer nor this plugin. If other databases need different access restrictions, they should have separate credentials.
It comes with all the themes published in Adminer’s Git repository, so you can select a style that suits you.

Database Access with Adminer

Secure and themed, just what I need. Of course I keep this plugin disabled, and only activate when I need to debug something. As an extra protection =)

Themed!

Provides a secure interface to your WordPress database using Adminer, the popular database administration tool.

rboatright

Meeting List stores and manages meeting information through your WordPress install. Originally created to manage a 12-step groups (AA, NA, CA, OA, GA, Ala-Anon, Etc.) list of meetings in a city.
It can also be put to use for any other weekly recurring meeting or event such as pool availability, sports teams practice, etc. Meeting entries can be marked as published or unpublished, or marked as not visible so they won’t display prematurely. There are functions to embed a list of meetings in a page, sorted by day. There’s also a notes field (for special focus, special topics, etc).
Thanks go to Deborah McDonnell for her plugin Bibliofly which was my hook into plugin writing.
NOTE 
This is pre-beta software, is rapidly changing and should not be used (yet) in a production environment!

MeetingList

Create and manage a list of meetings through your WordPress install

Database Access with Adminer vs MeetingList