Tabletop
Tabletop.js gives spreadsheets legs
List
Do you want a 3 KB (gzipped&minified) cross-browser native JavaScript that makes your plain HTML lists and tables super flexible, searchable, sortable and filterable? Yeah! Do you also want the possibility to add, edit and remove items by dead simple templating? Hell yeah!
Ri Ta Js
RiTa: the generative language toolkit (in JS)
Is.js
Micro check library
Deck.js
Modern HTML Presentations
Bookshelf
A simple Node.js ORM for PostgreSQL, MySQL and SQLite3 built on top of Knex.js
JS xls
Javascript XLS (Excel 97-2004 spreadsheet) parser and (one day) writer
Stretchy
Form element autosizing, the way it should be.
Elevator.js
Finally, a "back to top" button that behaves like a real elevator.
Incubator Echarts
A powerful, interactive charting and visualization library for browser
Uilang
A minimal, UI-focused programming language for web designers.
jsMessage
Custom messages, alerts, confirmations
Motus
Animation library that mimics CSS keyframes when scrolling.
LABjs
Loading And Blocking JavaScript: On-demand parallel loader for JavaScript with execution order dependencies
Infinity
UITableViews for the web.
Mithril.js
A Javascript Framework for Building Brilliant Applications
Emojify.js
A Javascript module to convert Emoji keywords to images