In the pnf group, many px have said that they didn't know how to access a forum or hadn't done it before.
Most people also have never run even a modest competition (myself included).
When I consider running a small competition, I am put off because I wouldn't have a clue where to find or how to download/use a randomiser.
I don't download things that haven't been recommended, and I've not come across recommendations or instructions for randomisers...
...so here's your opportunity to tell me what works well with Windows/Mac and what's involved with using it