Muzzle - Silence embarrassing notifications while screensharing
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
Upscope Screen Sharing for Intercom - No-downloads screen sharing fully integrated with Intercom.
WizTree - WizTree quickly finds the files and folders using the most space on your hard drive. It scans the MFT (Master File Table) instead of crawling the entire disk which makes it very fast.
Dead Simple Screen Sharing - Simple screen sharing and audio conferencing software.
SpaceSniffer - SpaceSniffer is a freeWare (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks.