CrossCoin Ventures startup accelerator is worth checking out if you are a dev or entrepreneur.

Creating something of lasting value is the best path to profit. Up to $50K USD in XRP is available for assistance funding your startup.

Note that both LibraTax and Coinist include focus beyond just the Ripple ecosystem. Saldo.mx offers realtime microremittances. All Crosscoin.

Edit: a general bounties program also exists that offers payouts in XRP, Bitcoin, Mastercoin, or USD. Bug bounties info is available separately here.