1.meetfranz / franzFranz is a free messaging app for services like WhatsApp, Slack, Messenger and many more.messagingelectronfranzmessengerwhatsappslack+3 moreJavaScriptAPACHE-2.04.7K total573 forks+34 starsfrom 4,694 · score 3.56
2.ramboxapp / community-editionArchivedFree and Open Source messaging and emailing app that combines common web applications into one.windowsmacoslinuxwhatsappmessengerskype+14 moreJavaScriptGPL-3.06.4K total773 forks+17 starsfrom 6,360 · score 2.89
3.tinode / webappTinode web chat using Reactchatchat-applicationchatappreacttinodeinstant-messaging+6 moreJavaScriptAPACHE-2.0362 total237 forks+6 starsfrom 356 · score 1.95