The Quality of Service (QoS) app is a network feature that allows administrators to prioritize certain types of Internet traffic. Enabling QoS decreases the likelihood that at any given time, a single user or device might degrade network performance by saturating available bandwidth.
The Multi-WAN app allows you to connect your system to multiple Internet connections. Multi-WAN offers many benefits to environments requiring a reliable connection, including load balancing, packet segregation and automatic failover.
Dropbox is a file hosting service operated by Dropbox, Inc. that offers cloud storage, file synchronization and client software. It allows users to tie a folder located on the server in the user's home directory to a Dropbox account of their choosing.
The users app allows an administrator to create, delete and modify users on the system. Marketplace apps that plugin directly to the user directory will automatically display options available to a user account.