oDC is an acronym for Opera's DC++ which is based on the popular Direct Connect clone DC++. Since DC++ is open source, you can download the source code and start modifying it. This is what I have done. To do this, you need to stick to GPL (GNU General Public License). That's why I release my modifications as well.

You can see oDC as version of DC++ that's always (almost) "more beta". I implement new features (rarely remove any, if ever done..), which means I "implement" new bugs.
This is a reason for some people not to use it. For others it's a matter of principles, and a few thinks it's worth it, for the fact of getting more features. But oDC still is, and always will be a feature rich "nightly build" of dc++. Anyway, if you think the following sounds interresting, you might wanna try oDC.

• Web links opens in new windows, instead of existing ones
• Seconds are shown in timestamps
• The sfv-check tells the result in the lowest status bar
• Auto-complete user names in main chat
• Skiplist. Files you don't want to be downloaded will be skipped
• Popup-menu for url's. Uou can either "Open", "Save as..." or "Add to Winamp playlist"
• "Go to file" in the popup menu in the search result window. Downloads the file list and "goes" to (focuses on) the file
• Notification in PM's when the user goes offline so you won't have to write messages that he/she won't see
• "Auto-search for alternatives" on both folders and multiple selected files
• User-specified textcolor (not just 16 colors, but Any color)
• User-defined colors in main chat (multicolor ie)
• Filter useless NMDC messages
• Filter in the user list. This way you can easily find users in the list
• Added icons to the window tabs, so you can easily see what that specific tab is (optional)
• Fast auto-search algorithm for the "search for alternatives" feature
• Customized colors for the progress bar in the transfer window
• Fast search for alternates for "releases"
• lastlog feature
• Support for multi-button-mice
• Vertical tile feature to be able to tile sub-windows vertically, not only horizontally
• Option (in the View-menu) to show/hide the transfer window
• "File menu" to the transfer menu, to open incomplete files (or its folder[s])
• Web Shortcuts. Now you can type eg. "/g [search string]" to search google directly from chat
• File information (dimmed) in transfer window for files not beeing currently downloaded but is waiting
• Update check feature