New features

Better integration with the Windows operating system
Windows 7:
Aero Glass
Aero Peek
Jump Lists
Opera Carakan JavaScript engine
Cross-platform bytecode interpreter for a new register-based instruction set
Internal object model with automatic classification and inline property caching
Machine code generation (JIT compiler)
Divided garbage collection heap: automatically traverses the memory of active heaps
Caching of compiled programs
Reduced memory usage
Additional Carakan information can be found here.
Opera “O” tab and menu
The new Opera “O” tab and its associated menu (located on the left side of the Opera Tab bar) replaces the traditional Opera Menu bar. This increases vertical space in the Opera desktop window, and centralizes frequently used features and tools in one, convenient location. Optionally, the new Opera “O” tab and menu can be replaced with the traditional Opera Menu bar by clicking “Show Menu Bar” in the Opera “O” menu. This new Opera feature contains the following items.
Tabs and Windows ►
Page ►
Print ►
Bookmarks ►
History
Downloads
Opera Unite ►
Synchronize Opera ►
Widgets ►
Notes
Mail and Chat Accounts
Mail ►
Contacts
Appearance
Settings ►
Help ►
Show Menu Bar
Exit
Opera Presto 2.5 rendering engine
Opera 10.50 (with Opera Widgets for Desktop) for Windows contains the latest Opera rendering engine: Opera Presto 2.5, and incorporates the following features.

CSS
Support is added for:
CSS 2.1 visibility: collapse
See: W3C section 11.2 Visibility: the visibility property
CSS3 border-radius property (rounded corners)
See: W3C section 4.4. The border-radius properties
CSS3 Backgrounds and Borders
See: W3C CSS Backgrounds and Borders Module Level 3
CSS3 2D Transforms
See: W3C CSS 2D Transforms Module Level 3
CSS3 Transitions
See: W3C CSS Transitions Module Level 3
HTML5
Support is added for:
HTML5

>> Opera website
>> Download Opera 10.50

>> Download Ubuntu / Kubuntu / Xubuntu Lucid alpha 3

Changes in version 4.20.1 “Torrent Joint”
Major Upgrade: BitTorrent Engine replaced for a lightweight version of the Azureus BitTorrent core.
FrostWire has become a far superior BitTorrent client starting version 4.20.x now supporting:
Trackerless Torrents (via Azureus DHT)
Improved Magnet link support (BTIH Magnet Links)
SuperSeeding
+100% Faster Torrent Connection Bootstraping (No more “sources needed” for some .torrents)
+100% Faster Torrent Downloads in some ocassions than 4.18.x
Transport Encryption capabilities
Improved UPnP implementation
New Feature: The Download Manager now has a new column showing the amount of bytes downloaded per download.
Update: The “Refresh Connections” Tool is now available even if you are Turbo Charged.
Fixes a bug where Crash Reports would always show an old version number.

>> Frostwire website
>> Download Frostwire

>> PeaZip website
>> Download PeaZip 3.0

libpurple
Fix ‘make check’ on OS X. (David Fang)
Fix a quirk in purple_markup_html_to_xhtml that caused some messages to be improperly converted to XHTML.
Set “controlling-mode” correctly when initializing a media session. Fixes receiving voice calls from Psi.
When looking up DNS records, use the type of record returned by the server (instead of the type we asked for) to determine how to process the record.
Fix an issue with parsing XML attributes that contain “<br>”. See ChangeLog.API for more details.
General
Correctly disable all missing dependencies when using the –disable-missing-dependencies option. (Gabriel Schulhof)
Gadu-Gadu
Fix display of avatars after a server-side change. (Krzysztof Klinikowski)
AIM
Allow setting and displaying icons between 1×1 and 100×100 pixels. Previously only icons between 48×48 and 50×50 were allowed.
MSN
Fix CVE-2010-0277, a possible remote crash when parsing an incoming SLP message. (Discovered by Fabian Yamaguchi)
File transfer requests will no longer cause a crash if you delete the file before the other side accepts.
Received files will no longer hold an extra lock after completion, meaning they can be moved or deleted without complaints from your OS.
Buddies who sign in from a second location will no longer cause an unnecessary chat window to open.
Support setting an animated GIF as a buddy icon.
Numerous code cleanups and memory savings.
MySpace
Fix a leak and crash when retrieving buddy icons.
XMPP
Less likely to send messages to a contact’s idle/inactive resource. Previously, if a message was received from a specific resource, responses would be sent to that resource until either it went offline or a message is received from another resource. Now, messages are sent to the bare JID upon receipt of any presence change from the contact.
Added support for the SCRAM-SHA-1 SASL mechanism. This is only available when built without Cyrus SASL support.
When getting info on a domain-only (server) JID, show uptime (when given by the result of the “last query”) and don’t show status as offline.
Fix getting info on your own JID.
Wrap XHTML messages in

, as described in XEP-0071, for compatibility with some clients.
Don’t do an SRV lookup for a STUN server associated with the account if one is already set globally in prefs.
Don’t send custom smileys larger than the recommended maximum object size specified in the BoB XEP. This prevents a client from being disconnected by servers that dislike overly-large stanzas.
Fix receiving messages without markup over an Openfire BOSH connection (forcibly put the stanzas in the jabber:client namespace).
The default value for the file transfer proxies is automatically updated when an account connects, if it is still the old (broken) default (from ‘proxy.jabber.org’ to ‘proxy.eu.jabber.org’).
Fix an issue where libpurple created duplicate buddies if the roster contains a buddy in two groups that differ only by case (e.g. “XMPP” and “xmpp”) (or not at all).
Yahoo
Don’t send and tags. (Fartash Faghri)
Support PingBox. PingBoxes will appear as pbx/PingBoxName. (Kartik Mohta)
Pidgin
Fix CVE-2010-0423, a denial of service attack due to the parsing of large numbers of smileys. (Discovered by Antti Hayrynen)
Correctly size conversation and status box entries when the interior-focus style property is diabled. (Gabriel Schulhof)
Correctly handle a multiline text field being required in a request form. (Thanks to Florian Zeitz for finding this problem)
Search friends by email-addresses in the buddy list. (Luoh Ren-Shan)
Allow dropping an image on Custom Smiley window to add a new one.
Prompt for confirmation when clearing a whiteboard (doodle) session. (Kartik Mohta)
Use the “hand” cursor when hovering over usernames in chat history to indicate that the username is an actionable item.
Double-clicking usernames in chat history will open an IM with that user.
Put an icon on the “Filter” button in the debug window.
Don’t treat “/messages/like/this ” as commands.
Explicitly mark user interaction when inserting smilies from the toolbar so “Undo” correctly removes these smilies.
Clicking “New” or “Saved” in the status selector menu while typing a status message no longer keeps the status entry area stuck in “typing” mode forever.
Show tooltips for ellipsized conversation tabs. On older systems, tooltips will show for all tabs.
The File Transfers and Debug Window windows are no longer created as dialogs. These windows should now have minimize buttons in many environments in which they were previously missing (including Windows).
Smiley themes with Windows line endings no longer cause theme descriptions not to be displayed in the theme selector.
Finch
Fix CVE-2010-0420, a possible remote crash when handling chat room buddy names.
Rebindable ‘move-first’ and ‘move-last’ actions for tree widgets. So it is possible to jump to the first or last entry in the buddy list (and other such lists) by pressing home or end key (defaults) respectively.

>> Pidgin website
>> Download Pidgin 2.6.6

>> Linux Mint website
>> Download Linux Mint 8 KDE

Changes in version 1.35.472:
Improved NTFS scanning algorithm.
Startup time improved with better memory management.
Added Compressed file type to Wizard.
Up and down keys now working correctly in the filter control.
GUI text changes.

>> Recuva website
>> Download Recuva 1.35.472

Changes in Paint.NET version 3.5.3 Beta, build 3685:
Fixed a mismatched file name issue with the File->Save dialog in Win7/Vista, as originally reported here. This issue is still present on XP but cannot be fixed.
Fixed DirectDraw Surface (.DDS) file format support for CPUs which do not have SSE2 (Pentium III, Athlon XP).
Fixed some crashes which were actually supposed to be “out of memory” error dialogs (without a crash!).
Fixed a race condition with the New Image, Resize, and Canvas Size dialogs. If you typed very very fast you could get it to crash by typing a negative value and immediately pressing OK or Enter..
Removed splash screen.

>> Paint.NET website
>> Download Paint.NET 3.5.3 beta build 3865

>> Read about what’s new in µTorrent 2.0
>> Download µTorrent 2.0

Changes between 1.0.4 and 1.0.5:

Decoders:
SubRip extra styles improvements
Fix potential crashes in SSA and svg decoders
Mac OS X Interface:
Improved support for the 2009 Apple Remote
Windows port:
Use of gcc 4.4.2 to compile instead of gcc 4.2. This might slightly increase performance and fix x264 issues
Translations:
Portuguese Brazilian, Lithunanian, Romanian, Ukranian, Japanese, Bengali, Walloon, Galician, Danish, Khmer, Polish, Slovenian, Vietnamese, Finnish Russian, Slovak translation updates
New Malayalam, Macedoninan, Nynorsk translations
Changes between 1.0.3 and 1.0.4:

Audio outputs:
Fix deadlocks in the audio output core
Make PulseAudio the default output if available
Video outputs:
Fix fullscreen mode with KDE 4.3.3 and other window managers
Fix incompatibility with cairo-dock and compositing
Input:
Fix DVB scanning regression from VLC 1.0.3
Support for XZ-compressed byte stream (LZMA algorithm)
Playlist:
Support for .m3u8 playlist files (UTF-8 M3U)
Unix:
Support for xcb-keysyms version 0.3.4 or higher
Fix globalhotkeys on FreeBSD
Qt4 interface:
Fix opening V4L version 1 devices
Fix default destination ports in the streaming wizard
Translations:
New Walloon translation
Swedish, Ukrainian and French translation updates

>> VLC website
>> Download VLC mediaplayer 1.0.5