You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
Free and open-source web application for MSPs that streamlines IT documentation, ticketing, invoicing, and accounting, an alternative to ITGlue. It helps in managing and organizing client's IT informa
itflow-orgAn Open Sourced Invoice System developed for anyone who needs to generate out an invoice and manage clients
poowfBalance accounting (bookkeeping) system based on debit and credit principle
illuminatechUbilling is opensource ISP billing system based on stargazer
nightflyza