APVA Office 365 GUI Manager
APVA Office 365 GUI Manager is a free tool for managing simple tasks in Microsoft Office 365 online without the hassle to get into PowerShell right away. Things like a simple password reset on users or managing mailbox permissions as ‘full mailbox access’ and ‘send as’ permissions I like to do easy.
_api JSON Viewer
One of the first things you wish for when working with SharePoint 2013 REST api, is a way to display the raw data, so you know what you have to work with. The _api JSON Viewer app is the tool that does exactly that, with a very user-friendly display and simple functionality. It even allows you to view JSON data across the site collection and every apps. This is a must have app for anyone working with the SharePoint 2013 REST _api. This app is for viewing purpose only and do not make it possible to change data.
Available in the Office App Store!
Fusion Charts Free for SharePoint
Fusion Charts Free for SharePoint (FCFS) provides a set of 22 different charts (2D & 3D) that integrates easily into your SharePoint environment (WSS 3.0 / MOSS 2007 / Sharepoint Foundation 2010 / Sharepoint Server 2010).