If you are looking for a fully-featured snippet manager then CodeBox is exactly what you need!

• Support for multiple libraries that can be put into the Dropbox to sync with your co-workers
• CodeBar helper app in the menu bar for browsing and searching through all known libraries
• Edit, Copy or Paste snippets into an active application right from the menu bar
• Use variable placeholders and abbreviations to replace text expanding software
• Extremely flexible snippet management using Tags, Folders, Groups and Smart Groups
• Over 100 syntaxes including CSS, HTML, JavaScript, C, C++, Objective-C, Python, and Ruby
• Import snippet libraries from the other snippet manager apps in one click
• Support for sharing snippets to the most popular social code services i.e Gist and Snipplr
• Each snippet can include multiple assets, for example "index.html", "script.js" and "styles.css"
• Drag and drop a custom .tmTheme into the code editor to change highlighting colors
• Import source code files and folders by dragging them into the app from Finder
• Create snippets faster using the bookmarklet Add To CodeBox or OS X Services
• All other features that you need from the code snippet manager while developing software