1.) What tool is the best tool that gives information about the reward you are getting and the time when they are supposed to be released.

Steemworld.org provides the most details about the rewards you will receive and has a countdown till rewards. It also has a tab to show in a pie chart who provided which votes and how much each is worth.

2.) What tool is use to discover which users contributed most to your reputation?

Not sure about a site that shows who contributes the most to your reputation. Although steem.supply has a tab to show who your most loyal followers are and a tab to show which tags are producing the most revenue for you. Steemworld.org also has a pie-chart to show the vote value percentage by each user.

3.) What tool is use in displaying a feed with the latest actions related to an account?

This depends on my connection speed and how much time I have. Steemd.com is good for a slow speed or a quick check of what has happened. Steemworld.org is my goto if I have a good internet connection because of all of the other tools and information.