has applets for what you want. Probably WMsupermon
is the applet you are looking for, as it provides all the information you mentioned, it's actually an all-in-one applet. There are, however, other Windowmaker applets for the purpose, such as WMND
, and many others you can look for in this
WindowMaker does not have a task bar, as IceWM, but that's not necessarily a bad thing. it's highly configurable (easier than IceWM,) and has applets for basically everything you can think of. It is also a very lightweight window manager, and will definitely run as fast as IceWM (probably faster) in an old machine with limited memory and limited resources in general. In fact, WindowMaker has a literally tiny memory footprint (~ 700 kb) and at the same time it's full of customization and applet choices. I believe it is worth a try, given your needs.
In one way or another, the applets I mentioned should run on other window managers as well. Never tested them on IceWM, but should run even there; they are not depending in the window manager too much.
If you really want a task bar as in IceWM, LXDE
also has applets for graphically monitoring net traffic and CPU usage, but not as many as WindowMaker, plus LXDE is a more "heavy" window manager - although still a lightweight one, and should run on old machines as well.
As for the other goodies you mentioned, such as Ctrl+V etc, they should work on IceWM if you install gnome support (corresponding package in Debian is icewm-gnome-support
; other distros might mention it as "icewm-gtk" or something similar.) In any case such keybindings work both on WindowMaker and LXDE.