I am often asked by my clients what Magento Extensions I can recommend for their shop. Thats why I created a (probably incomplete) list of Magento extensions that I regularly use in my Magento projects:
|WYSIWYG Editor Redactor||Administration, Must-Have|
|Mage Setup||Administration, Must-Have||quickly adapt your Magento Store to German Market incl. tax, localizations, etc. (former: German Setup)|
|TinyMCE HTML5 Compatibility||Administration, Must-Have||fixes issues with HTML5 tags in TinyMCE|
|AttachTermsAndConditions||Checkout, Must-Have||attaches Agreement PDFs to order email|
|AW Blog||CMS||nice, simple blog extension|
|AOE Scheduler||Administration, Must-Have||huge improvement to the original Magento scheduler|
|AutoShipping||Checkout, Must-Have||automatically add shipping costs in cart|
|Change Attribute Sets||Catalog||provides changing attribute sets after product creation|
|uDropship||Catalog||extension for dropshipping capabilities|
|BESUGRE Recommendation||Catalog||Product Recommendation Engine|
|M2E Pro||Catalog||eBay/Amazon/Rakuten interface|
If you want to quickly start creating responsive templates I suggest to take a look at my blog article about Magento Mobile Themes.
I always suggest you take a look at the source code of each of the extensions you are installing in your shop. Remember that every Magento extension may do everything!
Looking forward to your comments on these!