|Original author(s)||Neil Fraser, Quynh Neutron, Ellen Spertus, Mark Friedman|
|Initial release||May 2012|
Q1 2021 / 25 March 2021
|Operating system||Android, iOS|
|Available in||50 languages|
|License||Apache License 2.0|
Blockly development began in summer 2011. The first public release was in May 2012 at Maker Faire. Blockly was originally designed as a replacement for OpenBlocks in App Inventor. Neil Fraser began the project with Quynh Neutron, Ellen Spertus, and Mark Friedman as contributors.
The default graphical user interface (GUI) of the Blockly editor consists of a toolbox, which holds available blocks, and where a user can select blocks, and a workspace, where a user can drag and drop and rearrange blocks. The workspace also includes, by default, zoom icons, and a trashcan to delete blocks. The editor can be modified easily to customize and limit the available editing features and blocks.
Blockly is used in several notable projects, including: