bbalibor maintains a list of interbank rates. You can see current quoted rates for a given period.
Some bonds and paid in relation to interbank rates.
There's are also central bank rates.
The latest benchmark interest rates can be found at the respective reserve bank sites. You can lookup rates for EUR (Fixed rate), USD (Fed funds effective), AUD (Cash rate target)
Gross rate is the interest rate before tax is applied. It is typically calculated daily.
AER rate is the Annual Equivalent Rate. It is the rate you would receive if it is was calculated yearly. If you are paid interest more than once per year (e.g. monthly), then the AER will be higher than the Gross rate as it is calculated using compound interest.
Net rate is the Gross rate with tax deducted. In UK this is 20%.