Many applications have the built-in capability to send emails. For example, you can send a document from Microsoft Word, a PDF from Adobe Acrobat, or photos from Windows Explorer. The problem is that these don't work with web-based email, including Gmail.
gAttach! allows you to easily attach files to new messages in Gmail or Google Apps Mail.
All the features available in Windows that were once only available to your desktop mail-using friends are now available to all Gmail users.
Review:I hardly use the mail recipient found in the send to menu, mainly because i think outlook sucks and i prefer to just use Gmail instead of wasting time configuring outlook. Anyway if you want to use the mail recipient entry with Gmail then gAttach is just what you are looking for. This program will easily attach files to new messages in GMail that will be saved in the draft folder, its actually very easy and quickly to do. for extra convenience gAttach can install a Firefox extension that will open gmail right after you have attached a file, if you are going to do that then i suggest you use the "use HTTPS for added security".
In conclusion i feel that gAttach is a pretty good program if you have a Gmail account and are constantly attaching files, you can save lots of time using gAttach. Available for Windows 2000/2003/XP/Vista.
Get it at http://www.gattach.net/