1Leantime / leantimeLeantime is a goals focused project management system for non-project managers. Building with ADHD, Autism, and dyslexia in mind.project-managementphpsqlkanbangantttimesheets+14 morePHPAGPL-3.012K total1.2K forks+41 starsfrom 11,904 · score 3.74
2espocrm / espocrmEspoCRM – Open Source CRM Applicationcrmphpsingle-page-applicationcustomer-portalcalendarkanban+12 morePHPAGPL-3.03.5K total1K forks+21 starsfrom 3,520 · score 3.09
3EGroupware / egroupwareWeb based groupware server written in PHP, forum at https://help.egroupware.org/egroupwarewebmailproject-managementaddress-bookcalendarcaldav-server+4 morePHPOther license301 total115 forks+2 starsfrom 299 · score 1.10
4Intermesh / groupofficeGroup Office groupware and CRMgroupwarecrmcollaborationemailcalendaraddress-book+1 morePHPAGPL-3.0285 total61 forks+1 starsfrom 283 · score 0.69