I have been using these for few years and wanted to share the same.
This might be useful for both home and office depending on the need.
This list includes some technical stuffs as well.
Most of these are
free to use for personal use
AnvSoft Any video Converter - FREE
Converts videos from one format(s) to other format(s)
www.anvsoft.comCamStudio (Desktop Screen Recording - Video) - FREE
Download the CamStudio codec as well
But, I use TechSmith's codec because of the great quality and compression
http://camstudio.orghttp://www.free-codecs.com/download/camstudio_lossless_codec.htmhttp://www.free-codecs.com/download/TechSmith_Screen_Capture_Codec.htmFlipPDF (Convert your PDF into Flipbook) - FREE (Also paid versions available)
Check out other free tools offered by FlipPDF
http://www.flippdf.com/free-pdf-to-flip-book/index.htmlFoxit Reader / Foxit Advanced PDF Editor FREE / PAID
Nice app to edit PDF files
www.foxitsoftware.comFree PDF Merger - FREE
PDF Joiner, PDF combiner, PDF breaker, image to PDF converter
http://www.pdfmate.com/free-pdf-merger.htmlFreemake Video Converter (Image to Video) - FREE
I use this to convert multiple images to a video file.
It also converts from one video format to another
http://www.freemake.comFreeMp3WmaOggConverter from CyberPower Tech - FREE
Audio conversion and Video to Audio conversion
http://www.freemp3wmaconverter.com/GifApp (Gif Maker) - FREE
Make gif images from multiple images or video(s).
http://ivanbochko.comGimp 2 (Image Editor) - FREE
A good alternative to Photoshop
http://www.gimp.orgGoogle InputTools (Tamil / Hindi / Telugu etc) - FREE
A transliteration tool to write in English and get the output in the above desired language
http://www.google.com/inputtools/windowsGreenshot (Screen Capture and OCR) - FREE
Excellent screen capture and image editing tool.
Check out the screen shots.
For OCR to work (capture text from image) - install SharePoint Designer 2007
http://getgreenshot.org/http://sourceforge.net/projects/greenshot/http://www.microsoft.com/en-in/download/details.aspx?id=21581 (For SP designer)
MixPad (Audio Mixer) - FREE
Multi-track recording and mixing software
Download mp3el addon for working with MP3
http://www.nch.com.au/mixpad/index.htmlhttp://www.nch.com.au/components/Notepad++ (Excellent alternative to Notepad) - FREE
http://notepad-plus-plus.org/OfficeTab Free Edition (Tabbed Interface for MS Office) - FREE
http://www.extendoffice.com/download/office-tab-free-edition.htmlpdftk4all (PDF Editor) - FREE
http://pdftk4all.sourceforge.net/PDFill PDF Writer (PDF Editor) - FREE
PDF Writer, PDF Printer, PDF Creator or PDF Converter
Also download PDFill PDF Tools to merge, split, reorder, delete, encrypt, decrypt,
rotate, crop and reformat PDF pages and more.
http://www.pdfill.com/freewriter.htmlhttp://www.pdfill.com/pdf_tools_free.htmlPrimo PDF (PDF Printer) - FREE
Print anything to PDF instead of sending it to printer
http://www.primopdf.com/ScreenHunter (Screen Capture) - FREE
Another screen capture tool, but I like/use Greenshot
http://www.wisdom-soft.com/products/screenhunter_free.htmPortable Stickies (Sticky Notes) - FREE
Excellent Sticky app
http://www.zhornsoftware.co.uk/stickiesUniPDF (PDF to Word Converter) - FREE
http://unipdf.com/TechnicalAmmyy Admin v3.0 (Remote Desktop Sharing - LAN) - FREE
http://www.ammyy.comBasic4android -
PAIDRapid Application Development (RAD) tool for the Android platform
http://www.basic4ppc.com/Dia (Visio Alternative) - FREE
https://wiki.gnome.org/Apps/DiaHeidiSQL (Alternative MySQL Client) - FREE
http://www.heidisql.comIPMsg (very thin LAN Chat) - FREE
http://ipmsg.org/index.html.enOpen ModelSphere - FREE
Data, process and UML modeling tool
http://www.modelsphere.org/