Limit download speed Free download manager

If you live in a "shared internet" environment and you don't want to be selfish by hogging all the bandwidth for download you can always cap the bandwidth

If you are using Torrent, be default they allow you to do so

But if you want to use normal download, you have to use download manager
Here I would recommend FDM; Free Download Manager

Download link here : http://www.freedownloadmanager.org/

They have a feature for limit the bandwidth but you have to set the speed manually
Basically I set

1. Light mode = 20kBps max
2. Medium mode = 50 kBps max
3. Heavy mode = No limit

In Malaysia (normally or at least in my case)
20kBps download speed means you can play online game without lag or delay
50kbps download speed means you will lag in game, while okay for surfing website