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