I personally use Baïkal https://sabre.io/baikal/ for calendar creation. As desktop Clients, I rely on Thunderbird https://www.thunderbird.net/en-US/ and Morgen https://www.morgen.so In addition, I have explored alternatives such as Agendav https://github.com/agendav/agendav and Manage My Damn Life https://github.com/intri-in/manage-my-damn-life-nextjs Although Nextcloud offers a wide range of services, I find it to be a rather extensive solution for my needs, considering that my primary focus is calendar usage.

check this https://github.com/trungdq88/Awesome-Black-Friday-Cyber-Monday

Here you go, I personally use Actual https://actualbudget.com/
- https://github.com/BrunoBernardino/budgetzen-web#self-host-it
- https://github.com/budgetbee/budgetbee
- https://github.com/TheAxelander/OpenBudgeteer
- https://github.com/firefly-iii/firefly-iii
- https://github.com/ananthakumaran/paisa