Creating Custom Server Mods?

[Puppier]

I've been wanting to make a custom mod to go along with my server for players to download. I've been having trouble finding any resources sharing information on developing a custom mod...

 

[Dingham]

http://www.youtube.com/channel/UCXOevHnu6lzJqFNa1swefIQ

 

[TheDJParadox]

If anyone else sees this thread, I would also like to know how I could create server-side only mods. Like Bukkit plugins. But for MinecraftForge.