SharePoint Document Item Reordering is an invaluable and easy-to-use add-on that enables users to re-order the rank of list items in all types of SharePoint lists. Users are able to move any list items to any positions by simply clicking the buttons.
SharePoint Form Validation: client-side validation for SharePoint list field data, checking required field, regular expression and validating data range and compare.
Quickly cross-reference data from a list or site then apply a combination of filters to reduce the options presented in menus to eliminate error from incompatible values. Support look up information from "Date and Time" and "Number"columns.
The boostsolutions End-User Viewer Tool is a free tool that displays the total number of end-users in a SharePoint Site Collection or Farm and gives the administratorthe ability to delete invalid/inactive user accounts.