To be honest...
This is my most popular FREE package, that's why I want to share VERY USEFUL information with you!

Here comes a very powerful collection to make your own sound effects!

Requirements: ONLY YOU & YOUR TIME!

Check this out!

Quick Sound Generators:

BFXR https://www.bfxr.net/
JFXR https://jfxr.frozenfractal.com/
SFXR http://www.drpetter.se/project_sfxr.html
as3sfxr http://www.superflashbros.net/as3sfxr/
chiptone http://sfbgames.com/chiptone/ | https://sfbgames.itch.io/chiptone

famitracker http://famitracker.com/
OpenMPT https://openmpt.org/

And sometimes it’s worth looking through this page as well:
https://itch.io/tools/tag-music

List of useful Audio Tools For making:

Propellerhead Reason
Fruity Loops Studio
Ableton Live
Steinberg Cubase
Adobe Audition
Reaper Audio
Magix Software
Bosca Ceoil

For editing / converting:

Cool Edit Pro
Audacity
Format Factory

Have a nice day!