a-table.js is a simple table UI for generating table html. It's free to use (MIT license) and supports IE 9 ~, Safari, Chrome, Firefox.
X-editable is a library that allows you to create editable elements on your page. It can be used with Bootstrap, jQuery-UI, jQuery only. It includes both popup and inline modes.
Editable Listview is a jQuery Mobile Listview Widget that features an intuitive UI to allow insertion of new list items and removal of existing ones.
Gridmanager.js is a way of building rows and grids with built in editable regions; requires jQuery, jQueryUI, Bootstrap 3.x, & optional TinyMCE or CKEditor.
Editable Table is a tiny jQuery plugin turns any table into an editable spreadsheet.