Possibility to link a contact to more than one category. Example: Employee, Management, Project team. In general, the idea of linking an item to more than one category could apply to other items also, such as articles for instance. This would for instance reduce the use of featured articles as this would jus be another category.

Multicategory article support (single article can be assigned to several categories)

This would allow the creation and editing of any number of interlinked articles using a simplified markup language. Joomla sites could now create a new generation of collaborative work.

Joomla has more then 5000 files and over 30MB file size on it's installer! Why can't this be reduced? Many small files take forever to upload!

Framwork fuctions so the extensions developers could easily create cron tasks for things like: periodically send e-mails...

Have keyboard shortcut akin to menu icons, re: CTL-S for SAVE, etc. etc. so you could save content w/o needed to scroll up the page to SAVE and continue working; just do a CTL-S and keep rolling.

Mass mail from frontend: allow users (such as administrators, or publishers...) to send mass mails from frontend

Drupal has taxonomy and node fully customizable with alias.
Why Joomla can't have
http://joomla-site.com/news/sport/38-football
and not
http://joomla-site.com/component/content/article/38-football
?
I suggest to use a strange type of menu alias, with more options to do something like this.

I would like a list of all cookies or trackable technologies to be displayed to the visitor with all the relevant information Eg: Cookie/tracking Tech - What it is used for - By whom - Duration - Opt in for each cookie by all of these factors.

builtin idea/suggestion component for joomla, just like this uservoice service

We should have the option to choose multiple categories for category blog or category list inside the menu / menu item type. The idea of multi categorizaton would be usefull for articles too.

Atleast restore joomla 1.5 Poll and pdf feature

I think the Joomla development team should work with the developers of phpbb to intergate the two best open source platforms for the internet.

I am not saying make phpbb just for joomla, but you won't get a a better open source forum system.

Joomla needs to step up to the plate and get with SEO. Title attributes for links, alt for images, an easy way for developers to tap into an seo system to give metas and page titles

Fully customize search component where one can add filters, criteria.
The component is capable of fetching data from database directly to the content.

Since a basic sef support exists already, make it usuful for all languages

i used that -.- please put that function back ridicules to remove it

a social networking site with all current functions plus a area on the home page where student can submit there handy softwares which they have created to promote a craze of software revolution to the hole world atlist i need that type ofg site

Create an extended functionality in the search function, so when you click on a search result, the text is scrolled down to the searched term, and the search term is put in bold letters.
This is usefull for longer text.