FORUMS - certain facts and questions with respect to everyone

open source; language used; source code available; expandibility....

Respected people here,

I am fully aware that there is an old age contoversy as regards phpbb; vbulletin; sm forum; IPB;

I dont want to raise any controversy but just want answers to few questions:

# OUT of Phpbb; vbulletin; simple machines and invision power board:


Q1. Which is open source (meaning whose source code is freely available).....????

Q2. Which requires paying money but with source code...?????

Q2. What language and database each one of them use....?????

I would really really appreciate if someone can reply to all my three questions with respect to all four forums that i have said above....!!!!!!!!

Thanks in advance

Best regards,

sunando

Q1. phpBB and SMF

Q2. i'm not sure what you mean but i think what ones you pay for and get the source code, if that is your question then its vBulletin and IPB

Q3. phpBB - Uses php and can use the following databases (or higher versions)
MySQL 3.2x,
PostgreSQL 7.x,
Microsoft SQL Server 7/2000
Microsoft Access

vBulletin - Uses php and mySQL database

IPB - Uses php and can use the following databases
MySQL
MSSQL
Oracle

SMF uses php and MySQL 3.23.4 or higher.