The DropBox client is done as a plugin for NetDrive. So as a requirement you need NetDrive.
NetDrive for OS/2 is a virtual file system which allows to create a virtual volume and mount various resources to the volume. Current version of NetDrive for OS/2 supports local, network and FTP resources. More Information about NetDrive can be found at the developers home.
PMView Pro: a versatile and fast image viewer and converter. It supports over 40 graphic formats (gif, jpg, jpeg, bmp, tiff), converts to and from them, creates thumbnails, and more.
Qt makes software development smarter. It is a powerful plattform neutral framework that makes it easy to bring many applications to OS/2 that were written for various other plattforms. With this "Development Unit" you help us to further port Qt 5 to OS/2.
The GCC Compiler is used for most if not all of our projects. And many other free developers use it. Without a up to date compiler it's sometimes very hard to port projects to OS/2. So in the end this is a core part even most user don't see anything from it. With this "Development Unit" you help us to further port GCC to OS/2.