Linkek
Databases:
On-Line Encyclopedia of Integer Sequences (Sloane)
SequenceBoss
Basic Definitions of Complexity Classes
NP-compendium
Theorems of the 21st century
Academics:
Erdõs number and collaboration distance
Mathjobs
TeX:
Search Engine
LaTeX diff tool
(With 'clip < file.tex' you can copy contents of a file to clipboard on Windows)
LaTeX to html converter
DeTeXify
Create LaTeX tables
Create (Bib)TeX from titles
Conferences:
Combinatorics Conferences
Upcoming TCS Conferences
TCS Events
Acceptance ratio of TCS Conferences
Janos Pach's schedule
Me on:
Google Scholar
MathSciNet
Scopus
DBLP
MTMT
Research Gate
MathOverflow
CSTheory Stackexchange