What could I give as a  present to a friend I know since not too much time ?
To get you started, here are some common gifts you could give to someone you don't know that well:

* Food and drink: a basket of snacks or bottle of wine
* Useful products: a coffee mug or a calendar
* Indulgent products: gift soap or scented candles
* Experiences: day at a spa or tickets to an event

If you can tell me more about your friend (such as their age, gender, interests etc.) and let me know how much you are wanting to spend, I can give you more specific advice.
My friend is a dude who is really into video games and technology. I have 20 dollars of spending money. What are some good ideas for this type of person?
Here are a few ideas for gifts under $20 for someone who likes video games and technology:

1. A gift card to the online store for their video game platform of choice (such as Steam, PlayStation Store, Google Play, etc.). While many games cost more than $20, there are still many within this price point. Additionally, a gift card would allow your friend to combine the funds with their own money or other gift cards if they would prefer to purchase a more expensive game.
2. A magnetic wireless charger. While most people own basic chargers for their devices already, they may not have invested in a premium version. Wireless chargers can be a fast and convenient option for devices that support them.
3. A desk mat or mouse pad. This can be a thoughtful gift if you select one that fits your friend's taste and style.
4. Rechargable batteries. While they're not exactly glamorous, this is an affordable and versatile gift that can be used with many types of devices.
5. Wireless earbuds. These offer a very convenient option for listening to music or podcasts on the go, and are available for most mobile devices.

When purchasing gifts related to video games and technology, remember that these types of gifts are often dependant on compatibility and support for specific devices and platforms. Make sure that the gift you choose is compatible with the devices and platforms that your friend uses, otherwise they may not be able to enjoy your gift.