The ocelotgui application, more fully 'The Ocelot Graphical User Interface', allows users to connect to a MySQL or MariaDB DBMS server, enter SQL statements, and receive results. Some of its features are: syntax highlighting, user-settable colors and fonts for each part of the screen, and result-set displays with multi-line rows and resizable columns, and a debugger. Ocelot Computer Services is a Canadian company which has specialized in database products for thirty years. Its main employees worked for MySQL AB and Sun Microsystems and Oracle between 2003 and 2011. The ocelotgui program is a front end which connects to MySQL (tm) or MariaDB (tm). In some ways it is like the basic mysql client program, with added GUI features: full-screen editing, syntax highlighting, tabular display, customized fonts and colors. It differs from some other front-end GUI products because it is open source (GPL), it is written in C++, and it makes use of the Qt multi-platform widget library.