Originally posted by Website Rob Never heard of 'simple machines' so will leave that to someone else.
As to the other 3, all use PHP coding and only Phpbb is open source and requires no payment.
SMF is made by the same people as YaBB, except this one is much more efficient as far as resource usage. www.simplemachines.org
Q1. Which is open source (meaning whose source code is freely available).....????
All 3 are open source. However, vBulletin is not FREE.
Q2. Which requires paying money but with source code...?????
What language and database each one of them use....?????
They all use MySQL, IIRC. As for languages, I am pretty sure you can find language packs.
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"The team that has brought you YaBB SE has moved on to develop the next evolution in forum software, SMF. We have rebranded ourselves under the name Simple Machines and continue to strive to release the best free forum software out there and are ready to compete with products of the commercial caliber. To learn more about SMF please visit the Simple Machines website."
I was a great fan of YabbSe and am an even bigger fan of SMF. Not open source, but free, and easy to customise.