Image optimization is an important process when designing websites & producing content.

Smushit.com, an image optimization service, uses image format specific non-lossy image optimization tools to squeeze the last bytes out of your images - without changing their look or visual quality.
Smush.it comes in different flavours:
- Uploading multiple images via browser
- Mentioning image URLS online
- With the help of a Firefox extension
Also, a report is provided on "how many bytes can be saved" and all the changed images can be downloaded as a zip file.
Requirements: No Requirements
Flowplayer is a free Flash media player that can configured & styled to fit your needs.
It supports multiple media types: FLV, H.264 coded MP4, JPG, PNG & MP3.

Some features of Flowplayer:
- Full screen mode
- Progressive download
- Ability to play multiple files in 1 stream & ability to include images
- Streaming support: Flash Media Server, Wowza & Red5
- Quick access to specific chapters via thumbnails
- Protection against hotlinking to media files
- Embed links
This Flash media player can also be controlled with JavaScript & from other Flash movies.
Besides the free GPL license, there are several other paid licenses. So, make sure you check the licensing before using it.
P.S. This is not a very fresh resource but realized that it was missing in WRD & here it is.
Requirements: No Requirements
Everyday Icons has a playground area, which has a chic interface, presenting free patterns, icons & some PDF note designs.
Specially, patterns are high quality, can be previewed & downloaded in different colors.
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Currently, you can find 100 patterns and 6 small icon sets.
DinPattern by Evan Eckard is a website presenting quality & unique patterns created by him.
Currently there are 60+ free patterns to use.

New patterns are being added by time and before downloading them, you can easily preview how they look.