Zotero+from Endnote
http://www.zotero.org/support/kb/importing_records_from_endnote
In EndNote, select “Output Styles” from the Edit menu. From the list of output styles select RefMan (RIS). (If you do not see RIS as an option, you’ll need to download the style from the EndNote site. It could also be that the style is not enabled. You may have to go open the Output Styles Manager from the Edit menu, enable RIS, then close the manager before it's an option.) Once RefMan (RIS) is set as the format, select “Export” from the File menu. In the Export window that pops up, choose “Text Only”, select the RIS output style immediately below “Text Only” in the dialog, and hit “Save.” After exporting from EndNote, click on the gear icon () above the left column in your Zotero pane and select Import from the pull-down menu. In the file system window that pops up, locate the RIS file you exported from EndNote and select “Open.” Your references should be imported into Zotero.