1. Advanced Electron ForumThe community is relatively smaller, so you’re riding on just the documentation for support, if needed. Looks more like a dated copy of phpBB, but it does have an integrated shout box and news system to its credit.
Pros: Integrated shout box and news system
Cons: Small community
Offers excellent integration with WP and comes from the same stable as WordPress and. It shares the same database as WordPress, so if a user registers on the blog, he or she automatically gets a forum account.
Pros: Light-weight, superb integration with WP sites
Cons: Basic and limited features (in comparison to the others)
Can be termed as the unexploited talent among forum software. It is still relatively lesser known, but has several unique offerings up its sleeve.
Pros: Options to create a portal, etc.
Cons: Less popular, so small community support
4. Flux BB
It is free and highly responsive forum software that, at the moment, seems to show a lot of promise.
Pros: Light-weight, easily customizable
Cons: Still comparatively new, so there might be apprehensions about the future
5. FUD Forum
Is yet another light weight and easy to use forum software with great features such as Import of XML feeds as well as easy syncing with mailing lists.
Pros: Terrific features
Cons: Outdated (and dull) interface
6. Mini BB
Has numerous features and is one of the fastest growing forum software (in terms of popularity).
Pros: Awesome feature set, well support
Cons: Fast enough, yet not the fastest software around
7. MW Forum
Has nothing extraordinary to offer to its credit. However, most forum scripts are based on PHP. MW Forum, on the other hand, employs Perl.
Pros: Very fast
Cons: Basic set of features
Is one of the oldest players in the game (since 1998). Obviously, it enjoys widespread usage. However, of late, the update frequency has been lesser as compared to the newer alternatives.
Pros: Reliable, easy to install
Cons: Feature set becoming outdated
It has been in active development since 2000. If you’ve been into web development for some time, chances are, you’ve already encountered phpBB in action somewhere. It also has bridge and integration options with certain CMSes.