Welcome aboard.
There are tools you can find in the Resources section. Also, you can look at tutorials in Samples and Guides sub-forum/sub-category.
Editors, batch files, and other useful tools for producing or modifying content.
www.chronocrash.com
I wouldn't consider anything on which tool is the best, BUT very useful for your preference. I could give you some recommendations. For image editing program, you can use either Photoshop or GIMP.
If you wanna do it in 2D, not just 2.5D, you can do it with the OpenBOR template.
Originally known as "Blank module", these are basic templates to help get you started making your own OpenBOR game. Choose one of the following: Default - Template for pseudo 3D levels with X, Y, and Z axis movement allowed (i.e. Final Fight...
www.chronocrash.com
For faster applying palettes, try PalApply.
PalApply is a powerful tool by @Plombo that (as the name implies) applies color tables to images. This tool is a must get even if you have access to full featured image editors like Photoshop or Gimp. The batch mode is a fantastic timer saver...
www.chronocrash.com
For visual editing program for working on your OpenBOR projects, go with Chronocrash Modders Tools.
This experimental editor is still in beta stage but extremely powerful. Seamlessly switch between text and visual editing with an intuitive page based layout. Quickly add collisions, offsets, and ranges by drawing boxes with your mouse.
www.chronocrash.com
For audio editing, try Audacity or SoundForge. However, I do not know anything about SoundForge since I don't use it. I usually use Audacity most of the times. If not both of them, you can try GoldWave. It was so awesome to use until I couldn't play an audio anymore, so I stopped using it. That was years ago. However, while composing this message, I searched for GoldWave and, to my surprise, found out that there's a stable release of it a couple of months ago this year. Maybe you can have a chance to try it out. I'll try it out later.
For editing code, whether it's basic or advanced, you can use either Visual Studio or Sublime Text. I use Visual Studio for coding advanced stuff and it's readable every time I enter opening keys which come along with ending keys (especially in .c files).
If you wanna start with building your own game, you can follow this one.
Hello All, I have finally been able to start uploading our Beginner Course for OpenBOR. I've also noticed other tutorials that focused more on the asset creation, which is AWESOME. This course really focused more on understanding the mechanics of OpenBOR in a very plain way, so that people...
www.chronocrash.com
If you want to know more information on how to code, take a look at the manual here.
dcemulation.org
Or this one...
I'm not gonna explain about this, but you get the point.
Here is a beginner guide to start with OpenBOR especially characters.