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I need open source, mature, good, flexible, extensible php CRM with liberal free license that allowing for redistribution. I heard that SugarCRM is good one, but its not free, and right now their page is not working.


migration rejected from stackoverflow.com Aug 29 '13 at 21:33

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+1 for nice question – Predator Jul 4 '11 at 17:00
-1 for poor question – Lightness Races in Orbit Jul 4 '11 at 17:24

It's not quite true that Sugar isn't free, they just push the commercial options much more. (Most open-source projects with commercial options do this.)

The Community Edition is free, though the commercial editions do have additional features(again fairly standard practice). The main Open Source page has a PDF with detailed comparisons you can use to evaluate whether you even need them. The link is under the big red "Try Sugar - Free" button.

Sugar does throw a hissy fit if you edit certain files, though. Seems to have something to do with their "don't remove our attribution" protection, but it's overzealous. – ceejayoz Jul 4 '11 at 19:28

After trying out 20 different solutions I sticked with Feng Office, which has all I need. It just works without any bugs, has a usable GUI (which I may use in the browser I favor) and it's free (although the download is bit hidden).


There is also vTiger. It started as a fork of SugarCRM (long ago).


Zurmo is a fantastic CRM that encourages user participation: http://zurmo.org/