Firefox

1. AdBlock - Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
2. FoxyProxy - Plugin to quickly change the proxy.
3. Disable Ctrl + Q - disable the shortcut to close all the tabs.
4. Ctrl + Shift + T - restore last tab closed.
5. Ctrl + Shift + E - group tabs view
6. VideoDownloadHelper - Download video files, from any website
7. Video Speed Controller - Control youtube video speed.
8. DuckDuckGo Privacy Essentials - Privacy, simplified. tracker blocking, smarter encryption, DuckDuckGo private search, and more.
9. JsonView - Parses json string into objects and arrays.
10. Redux DevTools - Firebug plugin for jQuery development

Chrome

1. Folder upload option - Upload complete forlders by dragging and droping into chrome, not available in firefox
2. Prophet - extension to find email ids of people from LinkedIn
3. Postman - Make different types of request on URL which are not possible through browser like delete, put, post etc. Must have when you are building an API
4. Proxy switcher - extension to quickly change the proxy.
5. Save to Pocket - Save articles directly to Pocket read later service from chrome.
6. Be Limitless - Beautiful dashboard to easily identify where your time is spent and gives productivity.
7. Momentum - Another beautiful dashboard featuring todo, weather, and inspiration
8. Hola Free VPN - Access blocked website, youtube videos.

Common to Both Browsers

1. Incognito mode - Private browsing Ctrl + Shift + N(Chrome), Ctrl + Shift + P(Firefox)
2. Push Bullet (Chrome) (Firefox) - Sync media, messages across multiple devices.
3. Grammarly (Firefox) (Chrome) - Corrects the grammar while you type.

Websites

1. Dayt.se, khatrimaza, Couchtuner, Shush, KissAnime - Get all the tv series and movies in HD.
2. StackOverflow, StackExchange - Best QA sites
3. GeeksforGeeks - Learn algorithms and data structures
4. InterviewBit - For programming interview preparation. Complete this before starting of the final year for excellent placements
5. Bitport.io, Seedr.cc - 2GB of torrent direct download
6. Appxv - get free paid apps for Android
7. https://it-ebooks.info/- Download free ebooks.
8. Filehippo.com - Get all software for free.
9. Slack - Group chat for projects
10. Quora, Reddit - sites to read interesting content and get your queries answered.
11. Search for “index of serial” on Google - you would get one click download option in the results.
12. Ideone - online code editor.
13. Oduso - install multiple application in one go, using scripts made by this site.
14. Tlk.io - site to create a chat room and chat anonymously or sign-in.
15. IRC - chat site for professionals.
16. Pushbullet - cross platform notification sharing
17. Github student’s account, gist, bitbucket
18. Weiyun, Dropbox, MegaShare, GooglePhotos - 1 TB cloud storage
19. Urbandictionary - get the meaning of each and every slang/shortform used today.
20. Xdadevelopers.com - everything related to android.
21. Heroku, AWS, hostinger - hosting serivies for your projects
22. Koding.com
23. Stumbleupon - explore web new pages based on likes and dislikes and save pages.
24. Google forms - create simple and user friendly forms for submission of entries.
25. Feedly - RSS feed aggregator
26. Ssyoutube - download youtube videos.
27. Pininterest
28. Tripoto - Trip experience sharing site (TripLived android app)
29. Music.cliggo.com - Provides music from youtube (app also)
30. Requestmaker.com - like postman but online.
31. www.codinghorror.com - Blog of stackoverflow co founder Jeff
32. https://bento.io/ - Shows you the links and paths of various tools and languages.
33. Watch video in youtube without login: nsfwyoutube.com/link
34. SecurityKiss.com
35. http://www.linuxcommand.org -This site gets you familiar with linux terminal commands.(Beginners should definitely visit this.)
36. blackboxrepack.com - Download games in one click
37. kumpulbagi.id- Download music,movies,games.
38. 8tracks.com- Make and discover playlists.
39. 10minutemail.com- To avoid spam create a temporary email.
40. Hackerrank Calender - Schedule of every competitive competitions in the world

Single Page Web Application

1. HasteBin (Open Source Paste Bin )
2. gluPaste (glug nith paste bin )
3. VolaFile (Live File Sharing and chat)
4. http://www.koding.com/
5. Talky (Google Hangout without registration)
6. Flask.io (To do list without registration)
7. Pen.io (Write Blog without registration)
8. Rainy mood - soundrown.com like sites. Listen any youtube video in rainymood:
   1. just open the video on youtube
   2. Replace the www.youtube.com/... link as www.rainymood.com/...
   3. e.g.: Your youtubevideo: https://www.youtube.com/watch?v=NTHz9ephYTw.Change it to: https://www.rainymood.com/watch?v=NTHz9ephYTw and here you go!!
   4. 4.For more information visit : (http://rainymood.com/howto.html)
   5. Codeshare - Share live code editor without registration

Linux Software and Utilities

1. Guake - Drop down terminal
2. Pidgin - Chat client
3. Proxychains - work behind proxy easily4. Polipo - tunnel to http proxy
4. Terminator - advanced linux terminal
5. Genymotion - Fastest Android emulator.
6. Xdm - Xtreme Download Manager like IDM but free.
7. Conky, Docky - Lightweight system monitor and dock
8. Gimp - photo editing software in linux.
9. Tor Browser - Anonymous web browsing, bypass proxy.11. Sublime, Atom, VS Code editor
10. Wine - open windows files and softwares in linux
11. PlayOnLinux: windows files in linux
12. Ssh - get inside another person’s computer
13. SSH shuttle - no proxy SSH tunneling
14. Creating an ad-hoc
15. Privoxy - Routing everything via tor
16. VPN - network manager, open VPN
17. Synaptic package manager
18. Synapse Launcher - keystroke launcher, open applications, files using ust keyboard
19. Zsh - an alternative to bash, but much better
20. Virtual Box - run another OS within a OS
21. MegaSync - Mega client to sync files with MEGA cloud storage24. Byobu / tmux - Terminal multiplexers
22. Gparted - Partition editor for graphically managing your disk partition
23. Unetbootin, YUMI - Live USB creator
24. Kde-connection manager/creating hotspot(not ad hoc)
25. Samba - sharing files/folder in linux
26. Variety - automatically change wallpapers for linux. The source of wallpapers can be customized.
27. Crontab: Scheduling events
28. Apptik - A Tool to Backup/Restore Your Favourite PPAs and Apps in Ubuntu
29. TestDisk Data Recovery
30. Software For Recovery of data - Grsync, pybackup
31. Kodi - Complete home theater solution
32. ppa:noobslab - Best linux themes
33. Angry IP scanner - Scan IP subnets
34. gnome-tweak-tool - Tweak gnome
35. Ambiance - rainy mood alternative for desktop
36. Screen - used on a remote server to create multiple terminals
37. Easy Stroke Gesture recorder - control your desktop using mouse gestures
38. fzf - a genral purpose command line fuzzy finder, install it nd press Ctrl + R or Ctrl + T or ALT + C in terminal to see the magic.

Windows softwares and unilities

1. Putty - ssh tunnelling in windows.
2. Rainmeter - cool themes for windows
3. Cygwin - Linux like environment for windows
4. Bitvise SSH server - Create free SSH server
5. Open VPN
6. Git bash - git command line interface for Windows
7. Ext2explorer
8. Virtual Box, VMware - run different OS in windows.
9. Proxyfire
10. Privoxy - Routing everything via tor
11. Saavn,Gaana , Elpis, Audials - Songs related apps
12. LastPas - Stores password
13. IDM - Download Manager, faster than browser downloader.
14. Universal USB installer - create bootable pendrives
15. Visual Code - Code editor
16. Creating an ad-hoc
17. Netscan - easily detect which systems on LAN are open.
18. Ease US partiion manager and recovery - recovers partition and changes the partition length.
19. Format Factory - convert any format to any format
20. Visual Studio Community Edition - Best C/C++ ide for MS Windows
21. Everything - Super fast Desktop search engine
22. Team Viewer - Desktop sharing application

IOS

1. Get wifi working in iphones - Add gdr.local to the search domain of the network connected after adding the proxy.
2. Alienblue - reddit app
3. iMusic - Automatically saves youtube video once played.
4. Fing - Scan services n all the devices that are connected to the same network as your phone(iPhone).

Android applications

1. OpenVPN Connect - connect to VPN from your phone
2. CamScanner - Take photos of documents and save them as pdfs
3. Wunderlist, Any.do - Managing todo lists.
4. Merriam-webster - offline dictionary
5. Evernote - Write, manage and sync notes
6. Hooks - Notification alerts for various events like sports, youtube, tv shows, earthquakes, scores etc.
7. If - automation app. Defining events which trigger different events like when add a contact save it to google spreadsheet.
8. Moneyview
9. KingRoot - root your phone(at your own risk).
10. Google Keep - Write, manage and sync notes
11. Chromer - open links in floating windows
12. Define - word meanings from any app
13. Dropbox, Mega - Cloud storage services
14. JotterPad - for writing in markdown, with dropbox support
15. LastPass - Save passwords
16. Pocket - save articles to read later, even offline
17. Airdroid, WiFi File Transfer - sync between phone and laptop.
18. Rotation Control - force a certain rotation on android
19. Greenify - resource manager for Android.
20. ShareIt, Xander - File sharing service.
21. Shazam, Sound Cloud - detects music
22. MusicX - The best music player. Album arts, synced lyrics
23. Psiphon - Painless VPN client
24. Forkhub - Your git repos on your phone
25. Cleartune - Painlessly tune your guitar
26. Termux - Terminal emulator and Linux environment for Android
27. LIfe360 - Locate your family and friends using GPS
28. AdAway - Block most of Ads on your phone
29. SplitWise - Split bills and expenses with friends
30. BlockSite - For blocking websites in any browser.
31. QualityTime - For managing time and locking the phone for your concentration.

Linux commands and shortcuts

1. ps -el | grep <application name> - to get the process id of the process.
2. Kill -9 pid - to kill the process whose pid can be obtained from the previous command.
3. Killall <process_name> - to kill all the running process
4. Nohup <command> & - to run the command in background.
5. fg, bg
6. Top - to see which process is taking how much memory.
7. Ctrl + R - to search recursively
8. Ctrl + U - delete line
9. Use -E to add PPA
10. Alt + F2 - run command with suggestions.
11. Sudo !! - run last command with sudo.
12. Set brightness
13. Save a lot of battery - Go to Software and Updates -> Additonal Drivers and install latest stable proprietary release for NVIDIA or ATI
14. Gnome-screenshot, shutter - Take screenshot easily and with a lot of customization
15. Ctrl+Prt Sc: Screenshot without confirmation
16. Alt+Prt S -> Click on any window -> Release Alt: Screenshot of only that window
17. Shift+Prt Sc -> Select an area ->Release Shift: Screenshot of only that selected area
18. Add alias for running softwares
19. Chmod, chown - own a directory
20. TTY
21. Nbtscan - network discovery in linux
22. Middle click - shortcut to paste the current selected text.
23. cd -- - to get back to previous directory.