SQL
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Ted Codd in the early 1970s. This version, initially called "SEQUEL" ("Structured English Query Language"), was designed to manipulate and retrieve data stored in IBM's original quasi-relational database management system, System R, which a group at IBM San Jose Research Laboratory had developed during the 1970s.
HeidiSQL
Ansgar Becker began development on a MySQL front-end in 1999 naming the project "MySQL-Front" and used a direct API layer written by Matthias Fichtner to interface with MySQL servers and contained databases. Private development continued until 2003 with version 2.5.