I did some (re)search and came up with the following tools below (sorted by Alexa rating). I will pick five or so and do a little test project with them to see which one works best for my situation.
- http://transifex.comhttps://transifex.com
- http://crowdin.comhttps://crowdin.com
- http://smartling.comhttps://smartling.com
- http://oneskyapp.comhttps://oneskyapp.com
- http://poeditor.comhttps://poeditor.com
- http://phraseapp.comhttps://phraseapp.com
- http://webtranslateit.comhttps://webtranslateit.com
- http://getlocalization.comhttps://getlocalization.com
- http://lingohub.comhttps://lingohub.com
- http://lokalise.cohttps://lokalise.co
- http://weblate.orghttps://weblate.org
- http://across.nethttps://across.net
- http://alchemysoftware.comhttps://alchemysoftware.com
- http://qordoba.comhttps://qordoba.com
- http://textunited.comhttps://textunited.com
- http://applanga.comhttps://applanga.com
