SharePoint 2013 and SharePoint Online solution packs
The SharePoint 2013 and SharePoint Online solution packs contain code samples and documentation that demonstrate how to use site branding and site provisioning techniques, create and use UX components, and address search customization scenarios for SharePoint 2013 and SharePoint Online.
SharePoint 2013 Search Query Tool
Tool to test and debug the Search REST API in SharePoint 2013. Issue GET and POST search and suggestions queries. Use also against SharePoint Online.
SharePoint Client Browser for SharePoint 2010 and 2013
The SharePoint Client Browser uses the CSOM to connect to a remote SharePointSite Collection and shows the site structure with related properties and values.