| Type | App framework for JavaScript and AJAX |
| Features | UI updating with data changes • AJAX-based interaction • JavaScript prototyping tools |
| Released | 2005 |
| Used for | Complex, powerful dynamic applications |
| Developer | |
| Popularity | Declining, but left lasting impact |
| Written in | |
| Latest release | Prototype 1.7.3 (2015-07-27) [unmaintained] |
| Operating system | Cross-platform |
