I am not claiming anything about the trustworthiness of any of these...
Dividend Rippler
Issuer Address : rfYv1TXnwgDDK4WQNbFALykYuEBnrR4pDX
Units: BTC, LTC, TRC (bitcoin, litecoin, terracoin)
URL: https://www.dividendrippler.com/
Fees: https://www.dividendrippler.com/fees
Dividend Rippler Listed Assets
Issue Name: The Amazing Anonymous Bitcoin Lottery (TAABL.NET)
Issuer Address: rNF5qUPCcge7uSStj6oKuoQs38BaM8362s
Units: TBL
TTBit
Issuer Address: rGwUWgN5BEg3QGNY3RX2HfYowjUTZdid3E
Units: DYM (pre-1965 silver US dime)
URL: https://bitcointalk.org/index.php?topic=149533.0
Bitcoin Israel
Issuer Address: rNPRNzBB92BVpAhhZr4iXDTveCgV5Pofm9
Units: BTC, ILS (bitcoin, israeli new shekel)
URL: http://bitcoinisrael.co.il/
Ripple Union
Issuer Address: r3ADD8kXSUKHd6zTCKfnKT3zV9EZHjzp1S
Units: CAD
URL: http://rippleunion.com/
Bitstamp
Issuer Address: rvYAfWj5gh67oV6fW32ZzP3Aw4Eubs59B
Units: BTC/USD/EUR/CHF/JPY/GBP/AUD
URL: https://www.bitstamp.net/
(Bitstamp also sells XRP for USD)
Ripple Bandit
Issuer Address: rM3CxdfWgPqjFe6fta7bYTNmTcvfYoXQpC
Units: BTC
URL: http://ripplebandit.com:8000/
Issuer Address: rD374m3VRYfQX6fs9AanjazmKF8m4MH1fx
Units: FLP
URL: http://ripplebandit.com/
chriswen
Issuer Address: rDihBcUrrfDwUBZWBcuP2z5n47KVLQFNQH
Units: LTC (litecoin)
URL: https://bitcointalk.org/index.php?topic=155124.0
WeExchange
Weex CAD: r47RkFi1Ew3LvCNKT6ufw3ZCyj5AJiLHi9
Weex AUD: rBcYpuDT1aXNo4jnqczWJTytKGdBGufsre
Weex BTC: rpvfJ4mR6QQAeogpXEKnuyGBx8mYCSnYZi
Weex USD: r9vbV3EHvXWjSkeQ6CAcYVPGeq7TuiXY2X
URL: https://weexchange.co/
Bitcoinreactor
Issuer Address: rZQGU7Y5ZdLhNWTCV6BKJFcpLijyYVYWX
Units: TRC (terracoin)
URL: http://exchange.bitcoinreactor.com:8032/
RippleCN
Issuer Address: rnuF96W4SZoCJmbHYBFoJZpR8eCaxNvekK
Units: CNY, USD, BTC, LTC
URL: http://ripplecn.com/gateway/
Devcoin/Ripple Gateway
Issuer Name: emfox (https://bitcointalk.org/index.php?action=profile;u=87884)
Issuer Address: r3gHXhK1pwZFG9ESiaosxjufEVQjwGuJUd
Units: DVC (devcoin)
URL: http://ripple.d.evco.in/
Fees: 10 DVC redemption fee (cost of devcoin transaction fee)
The Rock Trading Company
Issuer Address: rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun
Units: EUR, USD, BTC, LTC, SLL (euros, us dollars, bitcoin, litecoin, second life linden dollars)
URL: https://www.therocktrading.com/
boardgamegeek GeekGold
Issuer Name: Lohoris
Issuer Address: rJQFX9CMwDHJ3NR1Lc86VoDNxVgBYFemGD
Units: XGG
URL: https://bitcointalk.org/index.php?topic=195024.0
WisePass
Issuer Address: rPDXxSZcuVL3ZWoyU82bcde3zwvmShkRyF
Units: USD, BRL, BTC, CAD, CHF, DKK, EUR, GBP, JPY, LTC, NOK, SEK
URL: https://wisepass.com/
GIT Tokens
Issuer Address: r4RKwCgmigUKLveuKDjNUR2uSi1WXUMQjg
Units: GIT
URL: http://entrances.github.io/
Ripple Links
https://ripple.com/graph/ Navigate ledger trust lines and transactions
http://rippledb.com/ Ripple Ledger Explorer
https://github.com/arvicco/rippler Command-line RPC client (ruby)
https://ripplecharts.com/ Charts
http://webr3.org/apps/xrp/charts/btc-xrp.html Live BTC/XRP and USD/XRP order books (a la Clark Moody)
https://github.com/singpolyma/ripple-rails Rails plugin for Ripple merchants
https://github.com/CodeShark/RippleGen Vanity address generator
http://www.reddit.com/r/ripplers ripple subreddit
https://ripple.com/forum/ official forum
Ripple Union
http://report.rippleunion.com/ Credit reports for ripple addresses
http://classic.rippleunion.com/ RippleUnion Gateway to Ripple Classic
http://classic.rippleunion.com/invoice/ Send an invoice to anyone who uses Ripple Classic.
http://rippleunion.com/invoice/ Ripple.com invoices
http://shop.rippleunion.com/ Proxy buying items for Ripple
https://xrptrader.com/ XRP Exchange
http://buyxrp.net/ XRP Exchange
https://www.bitcoinary.com/ Trade XRP for BTC and others
https://groups.google.com/forum/?fromgroups#!forum/rippleusers Google Group
http://ripplebandit.com/ Coin Flip Gambling for XRP
Other Implementations
https://villages.cc/ Ripple Father Ryan Fugger's cooperative economy
https://www.multiswap.net/ Circular Multilateral Barter http://sourceforge.net/projects/cmb/
http://www.abundx.com/ Abundant X-Change
Dividend Rippler
Issuer Address : rfYv1TXnwgDDK4WQNbFALykYuEBnrR4pDX
Units: BTC, LTC, TRC (bitcoin, litecoin, terracoin)
URL: https://www.dividendrippler.com/
Fees: https://www.dividendrippler.com/fees
Dividend Rippler Listed Assets
Issue Name: The Amazing Anonymous Bitcoin Lottery (TAABL.NET)
Issuer Address: rNF5qUPCcge7uSStj6oKuoQs38BaM8362s
Units: TBL
TTBit
Issuer Address: rGwUWgN5BEg3QGNY3RX2HfYowjUTZdid3E
Units: DYM (pre-1965 silver US dime)
URL: https://bitcointalk.org/index.php?topic=149533.0
Bitcoin Israel
Issuer Address: rNPRNzBB92BVpAhhZr4iXDTveCgV5Pofm9
Units: BTC, ILS (bitcoin, israeli new shekel)
URL: http://bitcoinisrael.co.il/
Ripple Union
Issuer Address: r3ADD8kXSUKHd6zTCKfnKT3zV9EZHjzp1S
Units: CAD
URL: http://rippleunion.com/
Bitstamp
Issuer Address: rvYAfWj5gh67oV6fW32ZzP3Aw4Eubs59B
Units: BTC/USD/EUR/CHF/JPY/GBP/AUD
URL: https://www.bitstamp.net/
(Bitstamp also sells XRP for USD)
Ripple Bandit
Issuer Address: rM3CxdfWgPqjFe6fta7bYTNmTcvfYoXQpC
Units: BTC
URL: http://ripplebandit.com:8000/
Issuer Address: rD374m3VRYfQX6fs9AanjazmKF8m4MH1fx
Units: FLP
URL: http://ripplebandit.com/
chriswen
Issuer Address: rDihBcUrrfDwUBZWBcuP2z5n47KVLQFNQH
Units: LTC (litecoin)
URL: https://bitcointalk.org/index.php?topic=155124.0
WeExchange
Weex CAD: r47RkFi1Ew3LvCNKT6ufw3ZCyj5AJiLHi9
Weex AUD: rBcYpuDT1aXNo4jnqczWJTytKGdBGufsre
Weex BTC: rpvfJ4mR6QQAeogpXEKnuyGBx8mYCSnYZi
Weex USD: r9vbV3EHvXWjSkeQ6CAcYVPGeq7TuiXY2X
URL: https://weexchange.co/
Bitcoinreactor
Issuer Address: rZQGU7Y5ZdLhNWTCV6BKJFcpLijyYVYWX
Units: TRC (terracoin)
URL: http://exchange.bitcoinreactor.com:8032/
RippleCN
Issuer Address: rnuF96W4SZoCJmbHYBFoJZpR8eCaxNvekK
Units: CNY, USD, BTC, LTC
URL: http://ripplecn.com/gateway/
Devcoin/Ripple Gateway
Issuer Name: emfox (https://bitcointalk.org/index.php?action=profile;u=87884)
Issuer Address: r3gHXhK1pwZFG9ESiaosxjufEVQjwGuJUd
Units: DVC (devcoin)
URL: http://ripple.d.evco.in/
Fees: 10 DVC redemption fee (cost of devcoin transaction fee)
The Rock Trading Company
Issuer Address: rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun
Units: EUR, USD, BTC, LTC, SLL (euros, us dollars, bitcoin, litecoin, second life linden dollars)
URL: https://www.therocktrading.com/
boardgamegeek GeekGold
Issuer Name: Lohoris
Issuer Address: rJQFX9CMwDHJ3NR1Lc86VoDNxVgBYFemGD
Units: XGG
URL: https://bitcointalk.org/index.php?topic=195024.0
WisePass
Issuer Address: rPDXxSZcuVL3ZWoyU82bcde3zwvmShkRyF
Units: USD, BRL, BTC, CAD, CHF, DKK, EUR, GBP, JPY, LTC, NOK, SEK
URL: https://wisepass.com/
GIT Tokens
Issuer Address: r4RKwCgmigUKLveuKDjNUR2uSi1WXUMQjg
Units: GIT
URL: http://entrances.github.io/
Ripple Links
https://ripple.com/graph/ Navigate ledger trust lines and transactions
http://rippledb.com/ Ripple Ledger Explorer
https://github.com/arvicco/rippler Command-line RPC client (ruby)
https://ripplecharts.com/ Charts
http://webr3.org/apps/xrp/charts/btc-xrp.html Live BTC/XRP and USD/XRP order books (a la Clark Moody)
https://github.com/singpolyma/ripple-rails Rails plugin for Ripple merchants
https://github.com/CodeShark/RippleGen Vanity address generator
http://www.reddit.com/r/ripplers ripple subreddit
https://ripple.com/forum/ official forum
Ripple Union
http://report.rippleunion.com/ Credit reports for ripple addresses
http://classic.rippleunion.com/ RippleUnion Gateway to Ripple Classic
http://classic.rippleunion.com/invoice/ Send an invoice to anyone who uses Ripple Classic.
http://rippleunion.com/invoice/ Ripple.com invoices
http://shop.rippleunion.com/ Proxy buying items for Ripple
https://xrptrader.com/ XRP Exchange
http://buyxrp.net/ XRP Exchange
https://www.bitcoinary.com/ Trade XRP for BTC and others
https://groups.google.com/forum/?fromgroups#!forum/rippleusers Google Group
http://ripplebandit.com/ Coin Flip Gambling for XRP
Other Implementations
https://villages.cc/ Ripple Father Ryan Fugger's cooperative economy
https://www.multiswap.net/ Circular Multilateral Barter http://sourceforge.net/projects/cmb/
http://www.abundx.com/ Abundant X-Change