XRP deposits will normally be credited within minutes.
Other cryptocurrency (BTC, ETH, ETC, REP) deposits will normally be deposited within one hour since being first confirmed on the corresponding network (Bitcoin or Ethereum/Classic). It can sometimes take more however: up to a few hours is still normal in some (rare) circumstances.
Please track your deposit transaction in the wallet/service you sent it from, or on public blockchain explorers, until it reaches one confirmation; after this, it will be normally be credited in another hour, or sometimes a few hours.
To track your transactions, you can use one of the following public blockchain explorers:
https://charts.ripple.com/#/graph -- Ripple accounts
https://charts.ripple.com/#/transactions -- Ripple transactions
https://bithomp.com/explorer/ -- Ripple accounts with cleaner transaction overview
To see REP balance and transactions for an address, enter the address in the Filter By Address field.