Resources

Here are a few webpages and programs that I have found useful in either running or managing a campaign.

http://www.fantasygrounds.com/
This is a virtual tabletop that allows all users to have a shared viewing space for documents and dice rolls. It comes with some of the more popular rulesets and can be programmed to include custom ones or allows for other user created rulesets to be downloaded into it. My group uses this since we are spread across three cities. It takes some work to really get the most out of it but it works wonderfully.

https://www.obsidianportal.com/
This website allows people to manage and share the information for a campaign. It provides space to post characters, write up an adventure log, and create a wiki among other things. Everything is divided into content that all can view and GM only viewing. It also is connect to an online community of gamers which provide an additional resource that can be helpful for beginners. I love this website since it makes organizing information and sharing so easy. I've posted my game's webpage below as an example.
https://high-thrills-and-social-ills.obsidianportal.com/