It depends on your needs. Also, yes, mouser's specific system is that it can't be software although that can be cheated. All you really need to do is have a peripheral that prints out index cards in a handwritten font but that's easier said than done.
Anyways, to be specific:
If all you really need are index cards then something like:
Scriveners Cork Board can work
or...
app's preferred tool, Notezilla allows you to have an overview.
If you need something much more like a single screenshot, there's
SuperNoteCard.
If it's all input then there are applications like Anuran which functions more like diary and well...it's all too big.
Mouser's system is really something that can be imported in tons of software easily.
The core weakness of software is that you have to have it on-hand and it needs to be as snappy when inputting the entries.
That's just not possible even with tablets. The closest thing to that kind of system is to have index cards and then scan them into Evernote.
Edit:If you're just looking for a print unto paper system, here's how Goalscape makes it look when you export it into pdf or print it out directly:
IDEA: Index Card System OrganizationIt's far from perfect but it is customizable and it releases the items in card based size.
