Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 779 378
2) Placement test : grammar for beginners (anonyme) 5 993 792
3) A/AN (webmaster) 5 366 310
4) Auxiliary BE (webmaster) 3 224 813
5) Present continuous (webmaster) 2 999 804
6) Present simple (webmaster) 2 916 558
7) Present simple (webmaster) 2 598 144
8) Present continuous (webmaster) 2 435 619
9) Adjectives (webmaster) 2 093 939
10) A/an (anonyme) 2 015 985
11) Present perfect simple (webmaster) 1 644 474
12) Preterite (webmaster) 1 629 478
13) Vocabulary - Placement test (bridg) 1 619 483
14) Preterite (webmaster) 1 448 507
15) Short placement test (webmaster) 1 443 823
16) To be (bridg) 1 406 635
17) What time is it? (webmaster) 1 349 712
18) Present perfect (webmaster) 1 347 002
19) The alphabet in English (webmaster) 1 321 454
20) Adjectives (anonyme) 1 216 284
21) What time is it? (webmaster) 1 209 107
22) Numbers (webmaster) 1 188 753
23) 'A' ou 'An' (anonyme) 1 176 045
24) Two presents: present continuous, present simple (webmaster) 1 149 794
25) To be (bridg) 1 145 851
26) Comparatives / Superlatives (webmaster) 1 105 136
27) Numbers (webmaster) 1 071 080
28) CAN / MUST (webmaster) 1 058 899
29) THE/ A / AN / nothing (webmaster) 1 034 148
30) Comparatives (webmaster) 1 007 449
31) Family life (bridg) 1 001 130
32) Numbers > 100 (webmaster) 986 580
33) Future (going to/will/present continuous) (anonyme) 964 386
34) Plural (webmaster) 956 009
35) Superlatives (webmaster) 875 522
36) Adjectives (anonyme) 875 057
37) Simple present (bridg) 854 249
38) Spelled words N°1 (bridg) 850 431
39) Placement test beginners: Check your spelling (anonyme) 830 199
40) Introducing oneself (webmaster) 827 340
41) Adverbs of frequency (anonyme) 817 843
42) Family (bridg) 785 018
43) General test-End of high school / Beginning of university (webmaster) 783 033
44) Present simple (anonyme) 781 346
45) Frequency adverbs (webmaster) 777 950
46) Present BE + Ving (bridg) 765 397
47) Genitive (webmaster) 723 850
48) Passive form (anonyme) 723 544
49) Family tree (anonyme) 719 607
50) Preterite: simple or continuous? (webmaster) 717 048
51) Placement test (beginners) (lili73) 701 410
52) Past simple or present perfect (anonyme) 694 600
53) Future (webmaster) 676 113
54) 2 Preterites (webmaster) 662 311
55) Present perfect simple (bridg) 661 755
56) Preterite (webmaster) 620 753
57) List of 200 irregular verbs and audio (bridg) 616 302
58) Modals (webmaster) 612 883
59) Spelled words N°2 (bridg) 609 399
60) Height (webmaster) 606 459
61) Modals (webmaster) 605 942
62) Articles a / an / the (anonyme) 596 766
63) Plural forms (bridg) 577 687
64) Nationalities (webmaster) 574 425
65) Past continuous / Past simple (anonyme) 566 929
66) Irregular plurals (bridg) 553 819
67) Two presents: simple and continuous (webmaster) 549 815
68) Preterite (bridg) 549 258
69) Superlatives (frapedur) 539 406
70) Vocabulary: greeting people (here4u) 536 492
71) Give your opinion (bridg) 532 157
72) Adverbs of Frequency (bridg) 517 101
73) Present simple or continuous (anonyme) 511 625
74) Present perfect / preterite ? (anonyme) 510 050
75) Possessive case (anonyme) 480 818
76) Countries & nationalities (bridg) 473 664
77) 'The' or nothing? (webmaster) 471 351
78) Past tenses (bridg) 471 098
79) Introducing oneself (easy) (webmaster) 470 832
80) Passive voice (webmaster) 463 720
81) Present Simple vs. Past Simple (anonyme) 457 796
82) Questions : how to ask them (anonyme) 448 588
83) General Test II / End of high school / Beginning of universi (webmaster) 446 255
84) IN, ON, AT or TO? (webmaster) 445 495
85) Relative pronouns (webmaster) 444 715
86) Comparative of superiority (anonyme) 438 953
87) How to pronounce the final -ED? (past simple) (webmaster) 438 158
88) Relative clauses (webmaster) 423 476
89) Sounds: [h] (webmaster) 419 607
90) Comparative (anonyme) 413 903
91) A/an/Ø (bridg) 398 991
92) Past simple (anonyme) 397 801
93) Future simple (anonyme) 396 594
94) This / That / These / Those (webmaster) 392 657
95) Conditional (webmaster) 391 841
96) Passive voice (anonyme) 390 826
97) Comparing (webmaster) 388 130
98) Can / could/ may/ might (woodyrun) 379 715
99) Present perfect or past tense (anonyme) 377 692
100) Much, many, little and few (felin) 373 057
101) Personal pronouns (anonyme) 371 403
102) Preterite continuous (BE + -ING) (webmaster) 369 516
103) Some, any, no, enough, too/too much/too many (webmaster) 368 236
104) Genitive case (bridg) 368 219
105) Confusing words - Placement test (bridg) 364 588
106) Irregular verbs (webmaster) 363 726
107) Numbers from 1 to 10 (anonyme) 361 613
108) Past perfect simple, past perfect continuous (anonyme) 360 962
109) Present continuous or present simple (webmaster) 359 673
110) Present perfect or preterite? (anonyme) 357 134
111) Simple Past : regular verbs (anonyme) 353 327
112) Comparative Adjectives (bridg) 352 316
113) Who, Whom, Which, or Whose? (anonyme) 348 924
114) Past simple (video) (anonyme) 348 589
115) Past simple or past continuous (anonyme) 343 069
116) While / When (anonyme) 339 151
117) What time is it? (webmaster) 338 081
118) Modals (tinou) 336 644
119) Modal: may/might (anonyme) 334 293
120) Cardinal and ordinal numbers (anonyme) 328 823
121) The superlative (anonyme) 325 821
122) Possessive adjectives and pronouns (woodyrun) 324 403
123) How to talk about the weather (lili73) 320 899
124) Since and for (anonyme) 318 971
125) Flags (webmaster) 317 667
126) Irregular verbs (bridg) 316 128
127) Prepositions - in, on, at (anonyme) 314 186
128) Pronouns (woodyrun) 313 825
129) Tenses (anonyme) 312 076
130) Placement test 3 (webmaster) 310 558
131) Order of adjectives (webmaster) 306 660
132) Could/Couldn't (laure95) 305 986
133) Comparative (anonyme) 304 767
134) Agreement Tags (webmaster) 304 125
135) Adjectives and prepositions (anonyme) 304 105
136) Asking questions (webmaster) 303 180
137) Present perfect OR simple past? (bridg) 298 476
138) Questions in the past tense (anonyme) 297 637
139) Superlative Adjectives (bridg) 295 882
140) Uncountable nouns (webmaster) 295 795
141) Object pronouns (bridg) 295 098
142) Placement test 1 (anonyme) 292 879
143) Passive form (anonyme) 291 557
144) Present simple (anonyme) 291 434
145) Can/Must/Should (laure95) 289 594
146) Prefer/rather (bridg) 289 516
147) Past perfect (lili73) 288 487
148) Must or Have to? (woodyrun) 287 671
149) The/an/nothing (bridg) 285 352
150) To be (anonyme) 283 519
151) Can and can't (laure95) 281 759
152) Vocabulary: asking and answering (here4u) 280 451
153) Modal verbs (bridg) 277 333
154) Some / Any / no... (bridg) 271 518
155) Days of the week (bridg) 269 117
156) So / neither (anonyme) 264 400
157) Past simple (video) (anonyme) 263 789
158) Present continuous (chnawa) 260 441
159) Used to (bridg) 260 426
160) Should / must (anonyme) 259 738
161) Past tense (anonyme) 259 391
162) Vocabulary: on the phone (here4u) 258 748
163) Find out a quantity (webmaster) 258 588
164) Superlative + and adjective (anonyme) 257 329
165) Articles : a / an / the / Ø (anonyme) 257 093
166) Comparative and superlative (anonyme) 255 516
167) Numbers 1/100 (anonyme) 253 689
168) Modal can (video) (anonyme) 253 045
169) Comparatives (anonyme) 248 691
170) Relatives pronouns (who, which, that...) (anonyme) 247 849
171) Vocabulary: at the restaurant (here4u) 245 668
172) A few, a little, few, little (anonyme) 245 494
173) Would rather / would prefer to (anonyme) 244 355
174) Present continuous and the Going to form (anonyme) 242 690
175) Should/ have to/ must (anonyme) 240 060
176) Have something done (anonyme) 239 877
177) The past (webmaster) 237 859
178) Used to/would (woodyrun) 237 681
179) Future continuous and future perfect. (felin) 237 644
180) How to ask a question in English (bridg) 235 531
181) I wish, if only (felin) 234 101
182) Pluperfect (webmaster) 233 997
183) Countable or Uncountable? (webmaster) 233 224
184) Some / any (younes91) 232 951
185) Should / shouldn't (anonyme) 231 591
186) Present simple or continuous (bridg) 230 802
187) Adjectives - ing and ed (felin) 229 145
188) Hypothesis (webmaster) 228 225
189) Auxiliary BE (anonyme) 226 470
190) Articles a/an/the/0 (bridg) 226 325
191) Article The or nothing (anonyme) 226 002
192) Must or mustn't (laure95) 225 775
193) Present perfect with Ever - never - (anonyme) 225 605
194) Present continuous OR Present simple? (bridg) 225 514
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 851
196) To / in order to / so as to / so that (irish21) 220 387
197) Present perfect (bridg) 219 527
198) Comparison (komiks) 219 007
199) What time is it ? (anonyme) 217 681
200) Indirect speech (bridg) 216 718
