Just a quick note to say that I'm working on a portable download manager. Started yesterday and is coming along nicely.
Primarily developing it for me. It's written in C# .NET. I know many people don't like .NET as a portable solution and I understand that. However, it suits me and may be of benefit to others.
For the moment, you can check it out at https://sourceforge.net/projects/portabledm/ and hoping to make maybe two releases a week, maybe more. I intend to make it totally free, including source code once I get out of ugly Alpha.
I'll wrap it in PortableApps structure in a week or so.
Comments welcome.