Newsgroups may or may not be Usenet, it can also be an interface to online forums.
The easiest to look around, specially if is a server not in Usenet, is using lynx:
Otherwise Alpine is great –even if a bit complicated to configure–.
- AIOE public news server – it has been down for a while, blog entry
- Eternal September – provides free access to text groups, but needs registerig
- List of free NNTP servers – sometimes off-line
- Another list of NNTP servers – another good list
I’ve been happy using news.blueworldhosting.com for read-only.
These three are connected and share groups:
SDF has some local groups (very inactive, needs account on SDF):