Below are some of the solutions that we at Liteclouds use as part of an implementation, this to ensure the use of best practices and to speed up the project.
Trigger Actions Framework: A modern framework to handle triggering events from both apex triggers and flows.
LiteX: Log and display code exceptions. A useful tool for Admins, BSAs as well as Developers.
LiteBatch: Batch individual transactions into groups and run them asynchronously.
LiteTrim: Keep your instance …
LiteMail: A centralized solution for sending emails.