Babies First Wad Edition.
Celebrating the recent release of D44M and because my PC is a piece of shit, I started making Doom maps for the first time
Doom Builder - http://www.doombuilder.com/
Depending on how well this thread goes, I'll make a paste-bin of our favorite wads and for wads created by anons like you. Thank you.
Another tool needed for Doom modding is XWE
https://www.doomworld.com/xwe/
I found some compatibility issues with Windows 7 and onwards but running it in compatibility mode seems to work fine.
Want to just jump into some mods and wet the pallet?
http://www.moddb.com/games/doom/mods