Electronic Notes 2.0

This program is offered without guarantee or warranty, either expressed or implied. It is up to you to determine if this program is suitable for your purposes. While the author may provide updates, improvements, or fixes, there is no obligation to do so.
Features:
Electronic Notes is designed specifically to manage research reference documents and to take notes.
It has the following features.
Display full title of the reference documents;
Open the reference documents directly by double-click;
Take and browse notes.
You can take notes on each reference document.
You can also use free notes, which do not related to any reference document.
Organize the reference documents
Classify the reference documents by different attributes of a document;
Target: what system is the reference document research for?
Problem: what problem of the target system was investigated in this document?
Method: what is the major method or technique used in this document?
Author
Source: where is the paper come from (journal, conference, …)
Rules: combine several attributes of the above.
Group the reference documents by reading status;
Web link, open the web page for a journal, author, etc.
Drag & drop support.