Birthday cards templates are available at Office.Microsoft or All-free-download websites. Better and easy way is to send out an e-card through 123greetings.com.
Postcard templates can be found at numerous web sites specializing in producing printing products. Some of these places include, Vistaprint, Zazzle, Moo and Overnight Prints. Postcard Design online templates can be found on LowCostPrintShop.com
You can obtain postcard templates from Microsoft Office which would give you some basic templates to base your advertising campaign on. You can download them online from Microsoft. Another option is to check out a selection of dedicated company's that will let you design using their templates and they can print off and post to you at a low cost. VistaPrint is one option, there are many others available online.
There are several different options in order to find some great looking templates for birthday cards. Some examples include "American Greetings", "GreetingSpring" (actually eCards, but those can be used as template, too!) or "CafePress".
There are numerous sites to find blog templates and some of these templates are free. A person can find blog templates at The BTemplates website and The Blog Skins Website.
You can find free e-mail templates at http://www.campaignmonitor.com/templates/. They offer hundreds of email templates, including html email.
If you have microsoft office you can go to their website and they will have free templates of all kinds. Intimateweddings.com also has some templates.
Some popular websites where you can find watercolor painting templates include Pinterest, Etsy, and Creative Market.
One can find continuity templates from local libraries. One could also find these some templates in office books, or downloadable off of office websites or library websites.
A person can find free invitation templates online on a number of different websites. Some websites you can find free invitation templates are Squidoo, Pinterest, Psprint, and Evite.
To find frame and border templates, one can check word processing programs, which should have some standard templates. One can also go to the official websites of these programs to download free templates.
Some popular websites where you can find paper cutting art templates include Etsy, Pinterest, and Creative Market.
www.smashingapps.com and www.quackit.com/html/templates are the addresses of two websites on which I have found free html templates. Hope this helps!