Limits for Salesforce

Displays real-time information about limits in your Salesforce org, such as:

* Concurrent requests for results of asynchronous report runs
* Concurrent synchronous report runs
* Daily API calls
* Daily Batch Apex and future method executions
* Daily Bulk API calls
* Daily generic streaming events
* Daily number of mass emails sent to external email addresses
* Daily number of single emails sent to external email addresses
* Daily Streaming API events
* Daily workflow emails
* Data storage
* File storage
* Hourly asynchronous report runs
* Hourly dashboard refreshes
* Hourly dashboard status requests
* Hourly OData callouts
* Hourly requests for dashboard results
* Hourly synchronous report runs
* Hourly workflow time triggers
* Permission sets
* Streaming API concurrent clients

And for each active Salesforce Site in your org:
* Daily bandwidth
* Daily request time

Link to install the optional Connected App in your Salesforce org:
https://login.salesforce.com/packaging/installPackage.apexp?p0=04t3600000101oy